The Power Block U70 Stage 3 add on kit expands the U70 up to 32kg (70.5lbs) per hand & requires U90 Stage 1+2. The U70 Stage 1-3 replaces 24 pairs of dumbbells or 748kg (1649lbs) of free weights. The kit offers a weight range of 27-32kg (59.5
- 70.5lbs) & is shipped in 2 boxes.