The KG Urethane Color Bumper Plates are offered in pairs of 5 KG increments and are sold individually in 10, 15, 20, and 25-kilograms. Additionally, we offer a 150 KG full set. Each plate features a 50.6 mm steel-lined center hole, which fits Olympic size barbells and will maintain their shape in between sets. The 5 KG plate is 24 mm thick to increase durability, while the 25 KG plate is 56 mm thick. This competition bumper plate is durable, made from rubber over a steel core, and is ideal for anyone serious about Olympic lifting.