V5 Heat Break Hotend Throat With Teflon Tube for 1.75mm Filament This is a V5 Heat Break Hotend Throat With Teflon Tube for 1.75mm Filament. This is a heat break compatible with the E3D V5 hot end for 3mm filament.  It comes with a PTFE insulation tube on the inside.  The heat break has a shoulder on the top to ensure that the PTFE tube does not move up inside the heat break. These are high-quality stainless steel sleeve tube caps that are ideal for use with 3D printer extruders that use 1.75mm filament. They can be used for a long time without any issues. This part will eliminate the PTFE liner and give you good, long-lasting performance with PLA. check out : PTFE 3x4mm White Teflon Tube for 3mm 3D Printer Filament - 1 Meter (3mm ID X 4mm OD) Also check V5 Heat Break Hotend Throat Without Teflon Tube designed for 1.75mm filament . It is compatible with the E3D V5 hot end for 3mm filament. Made from high-grade stainless steel, the heat break prevents heat creep and clogs.