The 2.7×4.5x10m yellow PTFE insert is a component designed to guide welding wire with a diameter of 1.6-2.0mm. Made of high quality Teflon (PTFE), it ensures smooth and stable wire feeding, reducing friction and the risk of wire deformation. It is compatible with PP FKS 400 series welding chucks, making it an ideal choice for professional MIG/MAG applications. With a length of 10 meters, it works well for a wide range of welding jobs.