For Olympic Weightlifting: Nothing else competes with the pure strength, quality and design of these IWF industry-standard Olympic weightlifting competition plates. Product Information: Stainless-steel insert and durable solid ‘Virgin Rubber’ will not bend or crack through the high torque of Olympic-weightlifting movements. Also, they won’t damage Olympic training platforms Diameter of hole is 50.44mm, Outer diameter of the disc is 450mm (IWF standards) Stainless Steel insert Calibrated to 0.7% accuracy of weight Colour coded for easy weight identification Available in 10 (Green), 15 (Yellow), 20 (Blue), 25kg (Red) Features: Designed to be used for Olympic lifting Discs will not break or distort through Olympic lifting movements Will not damage Olympic training platforms Manufactured by Jordan Fitness SPECIFICATION: Brand Jordan Usage Home Use, Commercial Use Condition Brand New Warranty 12 Months Warranty