1,[ABS Material] The use of sturdy ABS material, PTFE tube, wear resistant and durable, can be used for a long time. 2,[Compatible Range] Suitable for most 3D printers such for CR‑10, Ender series printer MK8 nozzle, compatible with all 1.75mm PLA ABS 3D printers. 3,[Scope of Application] 3D printer accessories are suitable for Ender 3 or 3 Pro or 5 CR‑10 Series or 10S or 20 or 20 Pro. 4,[Pneumatic Connector] Pneumatic connector, support 4mm trachea outer diameter access. Used to fix PTFE on the extruder and hot end. 5,[Fine Workmanship] The 10 piece PTFE tube set is made of materials and fine workmanship. It is the best choice for your printer accessories. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.