Allows for height adjustments from 36 Inch to 43 Inch (walker handgrip to floor). Combo Pack includes 1 pair Extension Leg with 5 Inch Wheels (item #10108W) and 1 pair Extension Legs (item #10108)5Inch 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 #10107) and glide covers (item #10107C) allowing use on all surfaces. To be purchased with Extension Legs (item #10108) or you can order the 10108WC. 350 lb. Weight Capacity.