Bed Sensor Pad Extra Large 1 Year 20 x 30 Recl Bath Chairs Accessories and improved posture * Use Color:Red and improved posture * Use as wobble or rocker board: 1 ball for wobble board 2 balls for rocker board * Level of difficulty is variable: 5 sizes of instability balls Larger ball is harder Color coded to difficulty Balls screw in out with ease * 3 sizes of platforms: smaller board is harder * Slots in platform fit band tubing: for full body exercise * Use hanging rack for compact storage: holds 10 balls and 4 platforms * 9 (683 mm) Depth: At Minimum Seat Height: 27 Slim design helps patients avoid the discomfort associated with other pads Bed pads are covered with soft comfortable vinyl are moisture resistant and easy to clean