The KG Elite Competition Black Bumper Plates are offered in pairs for the 10-kilogram plates and are sold individually in 15, 20, and 25-kilograms. Additionally, we offer a 140 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 uses. The 10 KG plate is 35mm thick to increase durability, while the 25 KG plate is 65mm thick. These competition bumper plates are durable, made from rubber over a steel core, and are ideal for anyone serious about Olympic lifting.