100% Original Capricorn XS Series tubing. | Capricorn PTFE is well regarded as the highest quality PTFE tubing in all of 3D printing. The tight tolerances make sure that the filament is lead directly to the hotend with as little room for error as possible between the extruder and the hotend. Capricorn PTFE XS Series is rated for withstanding the highest temperatures in the market which is perfect for printing exotic filaments such as ABS, Nylon, and Polycarbonate. | PC4-M6 Couplers: thread M6/3mm, inner diameter 4mm, fit for the tube whose outer diameter is 4mm, made of premium copper and plastic, sturdy and durable. PC4-M10 Couplers: thread M10/6mm, inner diameter 4mm, fit for the tube whose outer diameter is 4mm, made of high qulity stainless steel and plastic, high hardness, antioxidtion, anti corrosion. The extruder fittings are PC4-M6 and the hotend fittings are PC4-M10. | One PTFE cutter with an extra sharp razor is also included to ensure that the PTFE is cut flat on both sides to prevent any malfunctions or heat creep when feeding and retracting. | Any questions please feel free to contact us at any time. We will reply to you within 24 hours and provide technical support for you.