The raze black series rubber bumper plates improves your strength boost cardio fitness and adds muscle to your body with the brilliant black rubber bumper olympic plates a wide range of weight including 5kg 10kg 15kg 20kg and 25kg gives you all you need for an intense and challenging weight training program suitable for use in olympic lifting powerlifting cross fit and other heavy duty exercise regimes these rubber encased discs have been made to last width of each plate is as follows