The PowerBlock Sport 90 EXP Stage 2 Add On Kit expands the Sport 90 EXP Stage 1 set to 32kg (70.5lbs) per hand and together with the Stage 1 set, it replaces 22 pairs of dumbbells or 340.2kg (750lbs) of free weights. This solid and easy to use kit has a compact, space-efficient design and the weight is printed on the rails for easy selections. The add on kit adds 6 additional increments to Sport 90 EXP Stage 1 set and enables you to take your strength training to the next level. Plus, for enhanced durability it is coated with an anti-friction, non-textured paint.