When you buy the powerblock sports 90 stage 2 kit the powerblock sport 90 expands to accommodate an extra 12 pairs of dumbbells offering the following additional weight increments 25 26 27 295 305 32 34 35 36 385 40 and 41kg the powerblock sports 90 stage 2 kit is not a stand alone product it is to be used in conjunction with the powerblock sport 90 dumbells stage 1