Knee Immobilizer 12 Medium Whirpools Accessories 5 External Width: 21 Style:1 Pair (Left & Right) 5 External Width: 21 Improves seating posture while providing back support and comfort * Durable masonite board sercured on back of foam core prevents hammocking in sling back wheelchairs * Conforms to provide support to the lumbar region * Sealed liner protects foam core from moisture * Has a non slip vinyl back to prevent the cushion from sliding * Weight Capacity: 300 lbs 5 * Measurement 6 above knee: 17 75 * White cotton sateen laminated to 3 8 thick beige foam with alternating hook and loop closures * One each medial and lateral stay and three contoured posterior stays are all removable * HCPCS Suggested Code: L1830