ShoreStation’s most popular extension legs are 50” long, offering 10 additional settings, for an additional 25” adjustment. The standard duty extension leg fits all manual vertical boat lifts from 1,500 lbs. to 4,000 lbs. The heavy duty leg has the identical hole setting as the standard leg, is heavier in wall thickness, and fits in the corner post of all ShoreStation models from 5,000 lbs. manual to 15,000 lbs. hydraulic. ShoreStation offers a second extension leg for lifts over 5,000lbs. that are an additional 4’ long. Please note that if you add extension legs to any of the ShoreStation boat lifts, they may interfere with the ShoreStation boat lift canopy legs. This depends on whether the extension legs come out of the corner post and how high the canopy legs are set. We will discuss this issue if we feel this may be a problem.