Premium, proven and consistent performance at a great value. 5.5 in. hardened chrome steel center hub with 2.02 in. center bore. One-piece steel hub, no bolts or welds. Rubber shell is molded, cured, and adhered to an inner flange. Rubber shell enables a dead-blow performance when dropped. Warranty: Two years. Made from solid steel and composite rubber. Red and black color. No assembly required. 19 in. L x 2 in. W x 19 in. H (55 lbs.). Valor Premium Bumper Plates are designed for Olympic style platform lifts, as well as slower lifts such as deadlift and squat. The rubber makes for a quiet lifting session- even when dropped from overhead!