PNY1037 Features: * Bumper plate * Material: Virgin Rubber and Rubber Additives * Classification: High Grade Bumper Plate * Odor: Low * Insert type: Steel disc, zinc plated * Printed in South Carolina * Can control the quality of the print and the quality of the ink * Use a highly specialize ink formulated to adhere to this specific material * Collar opening allows for a snug fit on the bar* eliminating the loose fit bumpers can have * Hardness of the material is ideal to the Olympic weightlifters preference * Plate diameter: 450mm (IWF Standard is 450mm) * Collar opening: 50.40mm * Weight tolerance: +/- 10 grams of claimed weight Color/Finish: * Colored ink