The package contains 4pcs flux core gasless nozzle (KP1939-1), 4 x gas diffuser, 21 x contact tips(0.030inch/0.8mm) and 21 x contact tips (0.035inch/0.9mm). One set can be applied to various welding machines and multiple welding projects. It is enough to replace and daily use. The gasless welding nozzle is made of heat-resistant ABS material, which can reduce arc heat loss and help secure the thread and opening of the nozzle seat, extending the service life. It can prevent the nozzles from loosening and breaking, providing you with a higher welding performance and experience. The gas diffuser with standard threaded size has magnificent electrical properties making it perfect for use in light to medium-duty standard welding applications. we offer 2 different sizes of copper contact tips that can meet your needs. They are strong in texture, and high temperature resistant. The tips have good electricity conduct that can work well in welding projects. The flux core welding replacement accessories are compatible with for Magnum 100L welder & Weld-Pak 100HD 125HD 140HD 180HD, SP-170, for Mig135/175 and more. Please make sure you choose the right welding kit for your machine. Colour:As Shown Material:Aluminum alloy + brass Package Contents: 1set * for mig welders Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.