Threaded: M8 x 23mm. Rubber Size（Dia x Height）: 20 20mm 25 15mm 25 20mm 25 25mm 30 15mm 30 20mm 30 25mm 30 30mm 30 40mm 40 20mm 40 25mm 40 30mm 40 40mm. Material: natural rubber and steel. - Protect the body's normal work and get good surroundings, damping noise reduction and the effect is obvious.
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