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 Compatible 3D Printers : This PTFE adapter is designed for Lab and other 3D printers, serving as a efficient replacement part 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 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: TFAOYS