Lap Top Thick Cushion w/Cutouts for Half-Arm Wheelchairs Provides wheelchair positioning control and safety. with a minimal restrictive laptop cushion. Promotes proper sitting position. Polyfoam padded. Covered in durable. wipe-clean nylon. Safely keeps resident in wheelchair. Used with half arm wheelchairs. Fits 18" wheelchairs   Specifications Product # Material Pcs/Pkg 307040 Nylon 1/EA 307042 Nylon 1/EA 307044 Nylon 1/EA