Width Modification (WAMA) 10 measurement seat_width gt 18.0 WAMA manual_wheelchair Seat width exceeds 18 inches — width modification upcharge applies. Depth Modification (WAMB) 20 measurement seat_depth gt 18.0 WAMB manual_wheelchair Seat depth exceeds 18 inches — depth modification upcharge applies. Heavy Duty 250+ lbs (WAMF) 30 weight 250.0 350.0 WAMF both weight Client weight exceeds 250 lbs — heavy duty frame upcharge. Extra Heavy Duty 350+ lbs (WAMG) 31 weight 350.0 400.0 WAMG both weight Client weight exceeds 350 lbs — extra heavy duty frame upcharge. Bariatric 400+ lbs (WAMH) 32 weight 400.0 0 WAMH both weight Client weight exceeds 400 lbs — bariatric frame upcharge. Different Backrest Width (SEICF160L) 40 dimension_mismatch seat_width back_width SEICF160L both Backrest width differs from seat width — adapter hardware required.