Features: Our tubing is manufactured using the most sophisticated equipment currently available. It always comes out perfectly round, and the diameter stays as consistent as possible. The PTFE blue tubing outer diameter 4 mm, inner diameter 2 mm, which is applying to 1.75mm filament. This makes it well suited for printing larger or uneven diameter filaments such as wood and metal flake filaments. Higher end wood filaments especially have a tendency to be "chunky," containing large bits of real wood. The PC4-M6 and the PC4-M10 Pneumatic Fitting to secure PTFE in extruder and hot end. The PTFE cutter with an extra sharp blade is also included to ensure that the PTFE is cut flat on both sides to prevent any malfunctions or heat creep. Package Including: 1 x 1meter Bowden Tubing, 1 x PTFE Tube Cutter, 1 x PC4-M6 Fittings, 1 x PC4-M10 Fittings. Specification: Color: Dark Blue Tubing Length: 1m/3.2ft Tubing Diameter: 4mm*2mm(OD*ID) Package Size: 10 x 15 x 3cm/4 x 5.9 x 1.1in Package Weight: 60g/2.1oz Packing List: 1 x 1meter Bowden Tubing 1 x PTFE Tube Cutter 1 x PC4-M6 Fitting 1 x PC4-M10 Fitting