Upgraded Aluminum Hand Twist Leveling Nuts. These red aluminum nuts are original upgraded replacement part for Ender 3/3 Pro/3 X, Ender 5/5 Plus/ 5 Pro, CR-10, CR-10 V2, CR-10 Max, CR 10, CR-10 Mini, CR-10S, CR 10S Pro,CR-10 Plus, CR-X, CR 20. | 4x Hand Twist Level Nuts - Metal nuts was more powerful and will twist more tightly than the original plastic nuts. The torque of these nuts is large, making it easier to fine tune the hot bed, which keeps your printer level without having to level it often. | 1 Meter 100% Original Capricorn Bowden PTFE tubing - With lowest friction on the market. Less friction means more responsiveness, less retraction, more accurate prints, less slippage, wear, and tear on the extruder, and less clogging when printing chunky filaments such as some woodfills or ironfills. 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. | 4x Yellow Compression Springs - The die springs are a worthwhile upgrade, making bed levelling easier and stronger than the stock ones, so you don't have to worry about leveling the bed over and over after wash print. NOTE: The springs are around 25mm long, which is longer than ender 3 and ender 3 pro printer springs. You may use a tool to cut it to be shorter if you really like this product or adjust the hot bed to be higher to fit the springs. 4x M4x35 Screws are also included. | Technical Support - If you have any problems or questions about our product, please feel free to contact us. We will respond within 24 hours and offer professional technical support to you.