This is a shocking absorber bracket kit for four-wheel skateboard. Reduce shocking that bring from the uneven ground, and the sliding of the skateboard is stabilized to extent, ensuring your safety during the sliding process. This item is made of PU material, wear-resistant and practical for a use. Features -Color:Black -Material:PU -Size:1.80X1.80X1.50cm/0.71X0.71X0.59in -Note: including 3 different sizes in 12mm/0.47inch, 16mm/0.63inch, 18mm/0.71inch. -Made of PU material, sturdy and durable, which can serve you a long time. -Excellent workmanship and has a high elasticity for shockproof, wear. -This shocking absorber kit can effectively decrease the shocking of skateboard that brings from the uneven ground. -These devices are very convenient for you to install and take off, saving you . -Used to improve your skateboard truck performance, and has a smooth and good sliding experience. Package list: 12 x Truck Replacements