PTFE Tube: outside diameter 4mm, inside diameter 2mm; density 2.15-2.20g/cm3; it made of premium PTFE (Poly Tetra Fluoro Ethylene) material, safety and non-toxic, heat resistant up to 260 CelsiusPC4-M6 fittings: thread M6/3mm, inner diameter(blue end) 4mm, fit compatible with the tube whose outer diameter is 4mm, sturdy and durablePC4-M10 fittings: thread M10/6mm, inner diameter(black end) 4mm, fit compatible with the tube whose outer diameter is 4mm, high hardness, antioxidtion, anti corrosionCompatibility: compatible with all 1.75mm PLA ABS 3D printerInstallation: connecting by the outer thread of the quick fitting,easy to installEasy to Disassembly Press and hold the blue or black part of the quick fitting and pull out the tube Attention: Small parts, keep away from children colour:whiteMaterial:plasticPackage Contents:2 * 2M PTFE PTFE Bowden Tube4 * PC4-M6 Fittings 4 * PC4-M10FittingsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.