20 kg Calibrated Competition Bumper plates

Material:  Virgin Rubber

Diameter:  450 mm

Thickness:  55 mm

Hardness:  SHA85

Center plate material:  Carbon alloy steel

Center plate inner diameter:  50.6 mm (+/-0.2mm)

Surface treatment:  Nickel plating

Weight Tolerance:  +0.1%/-0.05%

Drop test:  25,000 times

Color:  Blue