Upgraded Design: Made of aluminium alloy, rust and corrosion resistance, metal nut is more powerful and will twist more tightly than plastic nuts, long service life. Package Include: Package comes with 4 pieces aluminum hand twist level nuts and 4 pieces yellow die spring, bright colors make you work happily. Size: The twist level nut is approx. 2.36 inch/ 60 mm in diameter, the torque of these nuts is large, making it easier to fine tune the hot bed. Easy To Use: Convenient installation, easy to level. It does not occupy any effective molding space of your printer. Suit For: Apply for 3D printer hot bed/ platform, the red nuts are original upgraded replacement part for Ender 3/3 Pro/3 X, etc.