1、Adopt high quality aluminum spring steel, durable, wear resistant, high toughness and not easy deformation. 2、Easy to install and use, it has good shock absorption performance when installed between the cushion and saddle tube. 3、Silicone protective cover, has good adsorption and not easy to fall, its high stability make sure safe riding. 4、The scale engraved on the side, you can adjust the position according to your needs. 5、Suitable for mountain bike, road bike, fixed gear, etc, with load bearing up to 150kg. Features: Adopt high quality aluminum spring steel, durable, wear resistant, high toughness and not easy deformation. Easy to install and use, it has good shock absorption performance when installed between the cushion and saddle tube. Silicone protective cover, has good adsorption and not easy to fall, its high stability make sure safe riding. The scale engraved on the side, you can adjust the position according to your needs. Suitable for mountain bike, road bike, fixed gear, etc, with load bearing up to 150kg. Specification: Material: Alloy Spring Steel Clamp+Aviation Aluminum+Silica Gel Color: as pictures shown Bear Load: 25-150KG Size: 16*5*8.5cm/6.3*2.0*3.4in Package Included: 1 x Saddle Suspension Device 1 x Hex Wrench Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.