The PowerBlock U-50 Dumbbell Set has a weight range of 5-50lbs 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. Value of the U-50 at $379/pair - cost per lb (replaces 1049 lbs) is 36¢ per lb. Compare to Urethane coated dumbbells at $2.99 lb costing $3136.51. Dimensions are; 13"L x 7.25" H x 7" W. Ships in 2 boxes.