Description:This item includes a stainless steel screw part and a PTFE sleeve tube. It is a perfect replacement for the broken part on old extruder and is also a usable workaround for cheap replacement extruder that didn't have a PTFEtube. It can be used on any 3D printer extruder that uses 1.75mm filament.Features:M6 screw part is made of high quality stainless steel, durable and long service life.There is a PTFE(Polytetrafluoroethylene) sleevetube inside which ensures fluent passing through of filament.Comes total 5 pieces in one pack and you can use them for quite a long time.Widely used and fit for any 3D printer extruder that uses 1.75mm filament.Great parts to built a 3D printer or used as a replacement for old or broken part.Specifications:Material: Stainless steel, PTFETotal Length: 30mmThread: M6Thread OD: 6mmThread ID: 4mm(one end), 2mm(the other end)PTFETube Length: 20mmPTFE Tube OD: 4mmPTFE Tube ID: 2mmSuitable For: 1.75mm filamentQuantity: 5pcsWeight: 15g(approx.)Package Includes:5pcs x Nozzle ThroatsNote:1. Please allow 0.1-0.3mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.