Features: Used with standard plastic welding gun-nozzle, this product is made of 304 high-temperature resistant stainless steel alloy. It has good corrosion resistance, heat resistance (up to about 800 degrees), low-temperature strength and mechanical properties. It will not have quality problems such as corrosion and oxidation deformation under high temperature for a long for time. It is an for ideal accessory for plastic welding accessories. Used for welding polypropylene, polyethylene, PVC and polycarbonate. Non stick electrode / smooth pull welding / high-precision. Mainly suitable for hot air guns which equipped with diaphragm pump.Stainless steel construction for more durability and high temperature resistance and anti-leakage.Fine workmanship and convenient and practical. This set of speed-welder is made of titanium-allot, sturdy and durable. which can bear high temperature and prevent leaking. With good resistance to high temperature. Resistant to high temperature, no leakage, convenience to replace, versatility. Specifications: Material:316 Stainless Steel Size:As Picture Shown Color:Silver Package Includes: 4x Welding Nozzle note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.