ITEM NAME:Bicycle Saddle Suspension Device Spring Mountain Bike Seat Shock Absorber Description: - Aluminum alloy spring steel, not easy to get deformed, wear-resistant and high toughness - Silicone protective cover, good adsorption and high stability. - With engraved scale on sides, you can adjust position. - Easy and convenient to install and use.installed between the seat cushion and the saddle tube, great shock absorbent. - Suitable for most bike, mountain bike, road bike, folding car,universal bikes. Specification: - Material:Aluminum Alloy - Color:Black - Size:Approx.16 x 8.5 x 5cm/6.30 x 3.35 x 1.97inch - Protective cover material: silicone - Bear weight: about 25-150kg Package Included: 1 Piece Bike Saddle Suspension Device Note: Please allow 1-3mm error due to manual measurement..Easy and convenient to install and use.installed between the seat cushion and the saddle tube, great shock absorbent. 1 Piece Bike Saddle Suspension Device. - Material:Aluminum Alloy. - With engraved scale on sides, you can adjust position.