Descriptions:These dampers are used for reducing stepper motor noise and vibration. Excellent anti-vibration dampers for quiet stepper motors.This item included 5 pcs dampers, and made of high quality metal and rubber, durable in use.Features:These dampers are used for reducing stepper motor noise and vibration.Excellent anti-vibration dampers for quiet stepper motors.Suitable for CNC 3D printer stepper motor.These dampers are effective to reduce shock.These energy- absorbing rubber mounts with a metal mounting face.Stepper motors are affected by resonance. Resonance is caused by parts vibrating in concert with each other, which can be lessened by fitting a stepper motor anti-vibration damper.This item included 5 pcs dampers ,and made of high quality metal and rubber, durable in use. Specifications:Material:metal, rubberQuantity: 5Size: as the picture Hole diameter: 9.5mm or 0.37inchWeight: 96gPackage Included:5 x Motor Vibration DamperNote: The style is random.