The use of high-quality materials, wear-resistant and durable, fine workmanship. Tighten horizontal nuts manually: Metal nuts are stronger and twist tighter than plastic nuts. These nuts have a large torque, making it easier to fine-tune the hot bed. Make the hot bed more stable, and the printing platform leveling is easier. PTFE tube, high temperature resistance, makes the filament feeding more smooth. Reduce the resistance on the extruder when printing, make travel smoother and improve print quality. Upgraded bed level spring, more rigid and accurate bed leveling. Suitable for 3/3 Pro/3 V2/5/5 Plus/5 Pro, -10, CR10S/10S Pro, 20 3D printer. Product name: 18 sets of 3D printer accessories and leveling nut size: 59x8mm Spring size: 25x8mm Leveling column (1): 18mm Leveling column (2): 16mm Screw: 3.5mm PTFE tube: 1m Pipe cutter: 78x26mm Scope of application: suitable for 3/3 Pro/3 V2/5/5 Plus/5 Pro, -10, CR10S/10S Pro, 20 Colour: picture color Material: ABS+metal Package Contents: 4 * Mold rigid spring 25mm 4 * Screw: /3.5 4 * Red metal leveling knob 3 * Leveling column 18mm 1 * Leveling column 16mm 1 * Pipe cutter 1 * 1m PTFE tube Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.