PowerBlock Sport 9.0 Stage 2 Add On Kit 23 41kgs Add On Stage to Sport 9.0 Stage 1 Dumbells Expands a Stage 1 Sport 9.0 to 41 kgs per hand. With the Stage 2 add on Kit this PowerBlock replaces 28 pairs of dumbells or 1163 kgs of free weights. Increments achieved with the Sport 9.0 Stage 2 add on kit are; 1, 2, 3, 5, 7, 8, 9, 11, 12, 14, 16, 17, 18, 20, 22, 23, 25, 26, 27, 29, 31, 32, 34, 35, 36, 39, 40 and 41 kgs per hand. The Sport 9.0 Set is a component based Set that can expand in weight to meet the needs of the user. The Sport 9.0 Set or any PowerBlock for that matter is the most compact dumbell available. The small size of the PowerBlock keeps the weight concentrated closer to your hand making the dumbell easier to control and balance. You can start with the Sport 9.0 Stage 1 Dumbells which go from 2 22.5 kgs. This set can then be expanded later to 41 kgs per hand using the Stage 2 add on kit. This Sport 9.0 Set can then be further expanded with the Stage 3 add on kit to 59 kgs per hand. The Sport 9.0 Stage 1 Dumbells will replace 16 pairs of dumbells or 374 kgs of free weights. Increments achieved with the Sport 9.0 Stage 1 Dumbells are; 1, 2, 3, 5, 7, 8, 9, 11, 12, 14, 16, 17, 18, 20, 22 and 22.5 kgs per hand. PowerBlock Dumbells Sport Series The Sport Series is the third generation of PowerBlocks new in June 2008. The Sports Series consists of 4 models of PowerBlocks with unique differences in both form and function. As far as form goes, the dramatic changes would be the grey colour of the steel weight plates vs.the black weight plates of other PowerBlock models and the rounded shaped top of the weight plates offering a stylish look. As far as function differences, the Sport Series has tapered handles, double tethered selector pins not on the Sport 2.4, the wrist supports are of a more open design offering a larger handle cavity and the dial locks are recessed into the handle