For the 900 hybrid, we have kept the same principle of two sizes that is found on all the Inesis clubs and three swing speeds. However, with the same speed designation (slow, medium, fast), the shafts of the 900 hybrid are significantly stiffer than those of the 500 hybrid.
LIN-Q 85H F3: 66g weight for low speed
LIN-Q 85H F4: 67g weight for medium speed
LIN-Q 85H F5: weight of 67 g for high speed