Rubber Vibration Isolator is mainly used for air compressors, engine engineers, gasoline engines, water pumps. Welding computers and other devices as mating , in order for the body normal work and good environment, dampening noise reduction and the effect is obvious. These brackets reduction of noise and vibration. Product Name: Rubber Vibration Isolator Buffer Material: metal, rubber External thread size (.): x 10mm (diameter * L) Internal thread Size (.): x 6mm (diameter * L) Rubber size (.): 15mm x 15mm height (.): 25mm / 1 inch Color: black, silver tone Weight: 22g Package content: 4 pcs x rubber vibration isolator buffer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.