100% Capricorn bowden Tube - High Temperature Resistance due to using only the highest quality PTFE. High Lubricity Additives - Makes our XS Series tubing the lowest friction Bowden tubing on the market. Less friction means more responsiveness, less retraction, more accurate prints, less slippage, wear, and tear on the extruder, and less clogging when printing chunky filaments such as some wood filings or iron filings. 1.9mm ± 0.05mm Inner Diameter - Outside diameter 4mm, inside diameter 1.95 mm ± 0.05 mm which reduces the "wiggle room," or buckling, inside the tube, allowing you to print flexible filaments even on the longest Bowden system. Compatibility - It was developed specifically for 1.75mm filament with an extremely precise internal diameter. When printing flexible filaments in a bowden system, the inside diameter of bowden liner is one of the critical feature for the successful print. Package Included - 1 piece Capricorn Bowden PTFE Tubing our XS Series 1.2 meter, 1 piece PC4-M6 Quick Fitting and 1 PC4-M10 Straight Pneumatic Fitting.