POWERBLOCK 50 Plus Dumbbell Set, Black Weight range of 5-50 pounds Replaces 18 pairs of dumbbells in the space of 1 pair. 10 year home use warranty Replaces 900 pounds of free weights Increments available 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30, 35, 37.5, 40, 45, 47.5 and 50 lbs per hand