SIQUK 4 Pieces PTFE Tubing with 8 Pieces PC4-M6 Fittings and 8 Pieces PC4-M10 Fittings for 3D Printer 1.75mm FilamentSpecificationBowden PTFE Blue TubingMaterial: PTFE (Poly Tetra Fluoro Ethylene),Density: 2.15-2.20g/cm3 Heat resistance, up to 260℃Outside Diameter: 4mm, Inside Diameter: 2mmColor: white and blueLength: 1mPC4-M6 FittingsPTFE Tubing OD: 4mmThread: M6/3mmMaterial: Copper, PlasticColor:golden+blueIt supports turn 360 degree freely, easy to disassemblePC4-M10 FittingsPTFE Tubing OD: 4mmThread: M10/6mmMaterial: stainless steel,PlasticColor:black+silverWidely use for connecting Bowden extruder , PTFE fittingsEasy to DisassemblyPress and hold the blue or black part of the quick fitting and pull out the tube.Attention: Small parts, keep away from children.package including:4 x1M PTFE Tube(2.0mm ID/4.0mm OD)8 x PC4-M6 Fittings8 x PC4-M10Fittings