Olympic weight Plates the Tunturi olympic weight Plates are made of 100% cast iron. The weight Plates have an inside diameter of 50 mm. The Plates have a rubber coating to protect the Floor. The Plates are available in the following weights: 1.25 kg 2.50 kg 5.0 kg 10.0 kg 15.0 kg 20.0 kg 25.0 kg most important features: 50 mm diameter available in various weights