Kd With Back Extra Strength Aluminum Will Accomodate Individuals Up To 500 Lbs. Cross Brace Attached With Aircraft-type Rivets Blow-molded Bench And Back Provide Comfort And Strength Drainage Holes In Seat Reduce Slipping Adjustable Height Legs Aluminum Frame Is Lightweight Durable And Corrosion Proof Height: 16 1/2 - 20 1/2 20 Width Seat Limited Lifetime Warranty Hcpcs Suggested Code: E0240