Handmade in Australia, made with only the highest quality materials available. The shape was tested vigorously and is widely known for its responsive feel on YTruck kingpins, very durable and comfortable to ride. Top and bottom consists of a barrel shaped bushing for more cushion for the thicker kingpins. 100% improvement over stock o ring tuning that is supplied with Ytrucks. Note these are designed specifically for Ytrucks and will not preform as well with other brand truck's. Each set comes with 4 bushings and some vinyl stickers.