The Bowflex SelectTech 1090 Dumbbell adjusts from 10 lbs up to 90 lbs in 5 lbs increments (10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, and 90 lbs). They replace up to 34 different dumbbells. The Bowflex SelectTech 1090 dumbbell is easy to use with just the simple turn of a dial on each end. The metal plates are covered with a durable molding that helps create a smooth an quiet lift off from its base. Product Features Adjustable from 10lbs(4.5kg) to 90lbs(40.8kg) in 5 lbs increments, replacing several dumbbells in one. Dimensions:17.5"L x 10"W" x 10"H(44.4 x 24.2 x 5.3cm) The Bowflex SelectTech Dumbbell uses a unique dialing system to change the weight.