This Spoolmate nozzle insulator is made of PTFE. Plus, it is compatible with Spoolmatic 15, Spoolmatic 30, XR, XR-Edge, XR-M, XR-Pistol, XR-Pistol-Pro, XR-Pistol-Pro Plus, 130831, 195156, 198127, 198128, 198129, 198130, 300782, 300783, 300784, 300786, 300787, 300788, Miller brand and is for use with XR-A/SPOOLMATIC 15/30A XR-EDGE FASTIP, XR/XR-M. It can be used for MIG welding.