Usage Guide: When using, connecting the PTFE tube from the tool head to the adapter ' s OUT port and insert up to 2 filaments into each IN port hole for smooth filament feeding without piercing bends Compatible 3D Printers: This PTFE adapter is designed for Lab and other 3D printers, serving as a efficient replacement part Wihout Configuration: Without, link the PTFE tube directly from tool head to adapter ' s OUT port while feeding filaments through IN ports for double materials printing capability User Friendly Improvement: Our upgraded detachable black head solves traditional PTFE tube removal difficulties with its ergonomic design for effortless maintenance and part replacement Upgraded Detachable Design: The 2 in 1 PTFE connector features a screw fixed design for easy disassembly and cleaning during filament jams or maintenance, outperforming standard PTFE fittings, Manufacturer: SHYYOULQE