With just the pull of a pin, the new Reebok® SpeedPac™ Adjustable Weights create five different weights ranging from 2.5 lbs up to 12.5 lbs without the hassle of five different dumbbell pairs.The Reebok® SpeedPac™ weights are very compact at just less than 5 inches tall. The specially designed storage tray, only 7.5 inches by 13.5 inches long, allows the dumbbells to sit in