107.123 | .75" / 20mm Wide Slot Nozzle
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
The TRIAC AT is an intelligent hot-air hand tool that is suitable for on-site use. This digital version of our most popular hand tool is designed to meet the needs of even the most demanding professional. Every tool undergoes stringent quality checks prior to leaving the factory in Switzerland. This high-quality, hot-air hand tool is equipped to handle all situations. Its universal areas of application are virtually unlimited. The TRIAC AT will continue to prove its merit in any weather condition and is just as effective outside as it is indoors – all during continuous operation.
Suitable for the work site
Closed-loop, controlled temperature
Open loop, controlled air volume
Intelligent “e-Drive” operating unit
Ergonomic handling
Modern design
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Additional Products and Accessories
Best Selling Nozzles
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107.132 | 1.5" / 40mm Wide Slot Nozzle
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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100.303 - 5mm tubular nozzle
To be used with all speed welding nozzles for the Triac ST, Triac AT and Diode.
Wide Slot Nozzles
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105.494 | Wide slot nozzle 30 x 2mm, 15° angled
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.130 | 40mm wide slot nozzle w/60 degree angle
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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105.487 | Wide slot nozzle 20mm, bent and angled, with clamps on inner side
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.135 | (ø 1.25 inch) 1.6 inch, PTFE coated | Wide Slot Nozzle
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.132 | 1.5" / 40mm Wide Slot Nozzle
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.131 | 3 3/8 inch wide | Wide Slot Nozzle
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.125 | ø 32 mm, 20 mm, 60° angled | Wide Slot Nozzle
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.123 | .75" / 20mm Wide Slot Nozzle
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
Speed Welding Nozzles
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106.996 | Tacking nozzle
This nozzle requires a 5mm round tubular nozzle:
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107.139 | Fillet Weld Nozzle 3/16" x 15/32" | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
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107.137 | For tape 0.3"/ 8 mm | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
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106.993 | 1/4 inch Triangular | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
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106.992 | 5/32" / 4mm | Triangular | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
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106.991 | 0.2" / 5 mm Round | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
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106.990 | 0.16" / 4 mm Round | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
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106.989 | 0.12 inch / 3mm Round | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
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105.433 | Narrow Preheat 0.2" / 5mm Round | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
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105.432 | Narrow Preheat 0.16" / 4mm Round | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
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105.431 | Narrow Preheat 0.12" / 3mm Round | Speed Welding Nozzle
This nozzle requires a 5mm round tubular nozzle:
Tubular Nozzles
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100.303 - 5mm tubular nozzle
To be used with all speed welding nozzles for the Triac ST, Triac AT and Diode.
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Screw-On Nozzles
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106.988 | Tacking nozzle
This nozzle requires a 5mm round tubular nozzle:
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113.874 | Round, without tacking tip, 0.16" | Screw On Nozzle
This nozzle screws onto Triac/Diode with the screw-on "protection tube" and requires the Triac/Diode nozzle adapter 143.833 or Hot Jet S/Labor S nozzle adapter 143.831. This nozzle also fits directly onto the Welding Pen.
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126.552 - 0.16” (4 mm) screw-on nozzle for fluor plastics
This nozzle screws onto Triac/Diode with the screw-on "protection tube" and requires the Triac/Diode nozzle adapter 143.833 or Hot Jet S/Labor S nozzle adapter 143.831. This nozzle also fits directly onto the Welding Pen.
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113.877 | Triangular shaped, without tacking tip, 3.54-0.22" | Screw On Nozzle
This nozzle screws onto Triac/Diode with the screw-on "protection tube" and requires the Triac/Diode nozzle adapter 143.833 or Hot Jet S/Labor S nozzle adapter 143.831. This nozzle also fits directly onto the Welding Pen.
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113.876 | Round, without tacking tip, 0.12" Screw On Nozzles
This nozzle screws onto Triac/Diode with the screw-on "protection tube" and requires the Triac/Diode nozzle adapter 143.833 or Hot Jet S/Labor S nozzle adapter 143.831. This nozzle also fits directly onto the Welding Pen.
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113.670 | Triangular shaped with tacking tip, 3.54-0.22" | Screw On Nozzle
This nozzle screws onto Triac/Diode with the screw-on "protection tube" and requires the Triac/Diode nozzle adapter 143.833 or Hot Jet S/Labor S nozzle adapter 143.831. This nozzle also fits directly onto the Welding Pen.
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113.666 | Round with tacking tip, ø 0.12" | Screw-On Nozzle
This nozzle screws onto Triac/Diode with the screw-on "protection tube" and requires the Triac/Diode nozzle adapter 143.833 or Hot Jet S/Labor S nozzle adapter 143.831. This nozzle also fits directly onto the Welding Pen.
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106.987 | Triangular Screw-On nozzle 0.27 x 0.21 inch
This nozzle screws onto Triac/Diode with the screw-on "protection tube" and requires the Triac/Diode nozzle adapter 143.833 or Hot Jet S/Labor S nozzle adapter 143.831. This nozzle also fits directly onto the Welding Pen.
Reflectors
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107.307 | Spoon reflector (1.25 inch) 1.06 x 1.37 inch
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.339 | Soldering reflector 32 mm, 17 x 34 mm | Soldering Nozzle
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.337 | Sieve reflector (1.25 inch) 1.96 x 1.37 inch
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.338 | Sieve reflector (1.25 inch) 1.37 x 0.8 inch
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
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107.324 - Sieve reflector 0.5 inch × 0.4 inch (12 x 10 mm)
This nozzle requires a 5mm round tubular nozzle:
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107.326 | Shell reflector (ø 1.26 inch) 0.98 x 5.9 inch | Reflector
Made of 304 stainless steel, compatible with Triac ST, Triac AT and Diode.
Heating Elements
Mica Tubes
Hand Pressure Rollers
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140.161 - 1.1” (28 mm) silicone pressure roller with ball bearings
Leister's 140.161 28 mm Pressure Roller has loads of grip with the wooden handle making it easier to seal welds without the need to exert excessive force.
Leister Cutters
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172.483 | Seam Weld Tester - multitool
The Leister Seam Weld Tester Multitool is designed for non-destructive testing of overlap welds on thermoplastic roofing membranes such as PVC and TPO. Developed in collaboration with Victorinox, this multifunctional tool combines a precision test probe with practical features including a Phillips screwdriver, bottle opener, fastening ring, and large serrated knife blade.
The redesigned Leister test probe glides smoothly and ergonomically along weld seams without damaging the membrane. If the probe slips into the overlap, a leak has been found and can be repaired. Suitable for both right- and left-handed users, it features an integrated hole that allows for easy one-handed opening—making it an essential companion for efficient, on-site weld inspection.
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