URETHANE SERIES SET
U33 Stage I has a weight range of 3 to 21lbs and is expandable to 33lbs with U33 Stage ll. This set replaces 16 pairs of dumbbells or 352lbs of free weight.
The Flex Series Urethane Sets from PowerBlock are the fourth generation of PowerBlocks. The Urethane coated weight plates offer the ultimate in smooth, quiet performance in addition to Flex technology (patent pending) in both the weight plates and the selector pins making for the most durable PowerBlock ever. The steel side colored rails are powder coat painted and are on both sides of each block. Urethane Series products carry a lifetime home warranty.