CUP Weight plates are made of high-quality urethane which is extremely scratchproof and rustproof. Hard-wearing urethane is low on odour, won't mark flooring and has less bounce than rubber plates. The stainless steel center ring provides a durable wear surface between the plate and the bar. Size: 1.25kg,2.5kg,5kg,10kg,15kg,20kg,25kg Fracture resistant & Easier to clean Extremely scratchproof and rustproof Harder wearing than the typical rubber bumper plate Has consistent dead bounce due to its high durometer rating