Features: ? Package Includes: 4pcs hand twist leveling nut, 4pcs hot bed spring, 2pcs silicone socks, 2pcs 0.4mm nozzles, 2pcs PC4-M6 Pneumatic Fittings and 2pcs PC4-M10 Pneumatic Fittings. ? The hand twists are made of premium metal material, durable and sturdy. ? Suitable for Ender 3/3 Pro, Ender 5/ 5 Pro, CR-10, CR-10 V2, CR-10 V3,CR-10 Max, CR 10, CR-10 Mini, CR-10S, CR 10S Pro,CR 10S Pro V2, CR-10 Plus. Make the hot bed become more stable. ? The silicone insulating sock can make the heater block heating faster, it can prevent the temperature spillover of the hot end, and help to keep the hotend temperature extremely stable. ? Made of high quality silica gel material, which is very durable, can be tightly wrapped with heating blocks, and is easy to disassemble and install. Specification: Material: Metal -Hand Twist Leveling Nut Screw Nut Diameter: About 60mm -Yellow Spring Outside Diameter: 10mm Package Size: 9 x 13 x 4cm/3.5 x 5.1 x 1.5in Package Weight: 200g/7oz Packing List: 4