1.This kit is equipped with screws of suitable size for easy installation. 2.3D Printers see a 5-10dB reduction in noise when used on x and Y Axis steppers with the vibration damper for NEMA 17 3.Make the 3D printer's motor quiet and reduce resonance. 4.There is a 3mm rubber ring between the two brass pieces to vibration. And reduce equipment noise and resonance 5.Compatible with most devices that use Nema17 stepper motors and 3D printers, such as -10/-10 V2/-3Pro NEMA17 damper screw: stainless steel Size: *5mm Item Type: Shock Absorption Pad colour:gold Material:copper size:40*40*6mm Package Contents: 4 * Shock Absorption Pad 8 * M3x5mm Screws Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.