AliMed® Drop Seat fits almost any chair! Sturdy plastic drop seat attaches with strong webbing that independently adjusts in the front and the rear. Lowers seat up to 3". Use as a level seat or incline it for a wedge effect. Add a specially configured 2" thick AliMed® Polyfoam or T-Foam™ Combo Cushion (1" high-density foam topped with 1" Medium T-Foam) that clears the crossbars. Sewn. Vinyl construction. Drop seat fits both 16" and 18"W x 16"D wheelchairs.