Features: brand new and high quality brand new and high quality The blue color PTFE tube outside diameter 4mm, inside diameter 2mm, density 2.15-2.20g/cm3. PC4-M6 fittings - thread M6/3mm, inner diameter(blue end) 4mm, fit for the tube whose outer diameter is 4mm. PC4-M10 fittings - thread M10/6mm, inner diameter(black end) 4mm, fit for the tube whose outer diameter is 4mm. The PTFE tube made of durable PTFE (Poly Tetra Fluoro Ethylene) premium material , PC4-M6 Fittings is made of Copper; PC4-M10 Fittings is made of stainless steel. Note - small 3D printer accessories, please keep away from children. Specifications: Length: approx. 1 meter/39.37in ID: 2mm OD: 4mm Working temperature:-190c to 280c Chemically resistant (all common solvents, acids and bases) Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1 x 1m PTFE Tube (for 3D v5/v6 1.75mm extruder) 1 x PC4-M6 Fitting 1 x PC4-M10 Fitting