Function: the stepper dampers are used for reducing noise and resonance of the CNC and 3D printer, improving the printing speed
Stepper damper: thickness is 6 mm, made of brass material which is wearproof and with good performance, won't break easily
Screws: come with 12 pieces screws, made of sturdy and durable stainless steel material, size M5 x 5mm
Package: 6pcs stepper dampers, 12pcs screws
Warm note: Maybe there are a little oil or rust because the stepper dampers were removed from the other machine, but they are never used before.