Manopola a molla di livellamento torsione manuale letto termico M4 dado a vite per Ender 3/5 CR-20
Upgraded Aluminum Hand Twist Level Nut. Last Over Years. The torque of these nuts is large, making it easier to fine tune the hot bed. The springs are around 25mm long, which is longer than ender 3 and ender 3 pro printer springs.