Wheelchairs, Mobility Scooters and Accessories Cushions, Mobility & Daily Living Aids, Mobility Aids & Equipment, Wheelchair Accessories Current Solutions PC3420 Memory Foam Knee Seperator Cushion Review by RoomPony July 18, 2018 No Comments The Roscoe Knee Separator stabilizes the pelvis and lower back, helping to align the back, hips and knees. It has a removable, soft terry-velour cover for machine washing. 1 year warranty. Size: 9” x 7.5” x 5”.