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.
U-50 Set has a weight range of 5-50 lbs per hand, gives every 2.5 lb increment, and replaces 20 pairs of dumbbells in the space of 1 pair. The U-50 Set replaces the equivalent of 1049 lbs of free weights. The weight increments achieved with the U-50 Set are: 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30, 32.5, 35, 37.5, 40, 42.5, 45, 47.5, and 50 lbs per hand.