【Quality Assurance】Those Twist Nuts are all original and high quality from 100% quality assurance. Made by high quality aluminum, last much longer your stock plastic nuts. 【Highly Compatible】Upgraded aluminum hand twist level nut are original upgraded replacement part for Ender 3/3 Pro/3 V2/3 Max, Ender 5/5 Plus/ 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, CR-X, CR 20. 【Easy to use】It's very easy to use, you just only to take off the old one and put on our nuts and springs. The torque of these nuts is large, making it easier to fine tune the hot bed. 【Package List】4 Pcs aluminum level nuts (60mm) , 4 Pcs yellow die spring (8*20mm), 5 Pcs 0.4mm Nozzles 【After Sales Service】Creality pays great attention to the buyer’s user experience. If you have unsolvable problems during installation and use, please feel free to contact us, our after-sales technical team will provide you with detailed solutions within 24 hours.