This is a 4 piece kit that comes with 2 extension legs w/wheels and 2 extension legs with tips allowing replacement for all 4 corners of the walker in one item * Allows for height adjustments from 36 to 43 (walker handgrip to floor). (Adds 4 to height of walker) * 5 rubber wheel allows walker to roll easily and smoothly over irregular surfaces * For use with all Drive and most leading manufactures walkers * Includes rear glide caps (item #1085A) and glide covers (item #1085C) allowing use on all surfacesi * 350 lb. Weight Capacity