PNY1021 Features: * Bumper plate * Material: Virgin Rubber and Rubber Additives * Classification: Black Economy Plate * Insert type: Stainless Steel * Odor: Low * Flawless surface area with a higher and more consistent durometer reading (firmer) * More accurate weight to the claimed weight * Plate diameter: 450mm (IWF Standard is 450mm) * Collar opening: 50.4mm * Weight tolerance: +/- 10 grams of claimed weight Color/Finish: * Coloring: A (graded: A through F)