Roho Quadtro Select Cushion 15 x 18 x 4.25 Patient Lifters Slings Parts 5 Back Height From Floor: or Parkinson s 5 Back Height From Floor: 32 36 18 X 16 * The contoured design combined with the simple operation of the ISOFLO© Memory Control unit offers provides a new level of postural control and stability that has never been achieved in an air cushion * The contoured design positions the pelvis back in the wheelchair and centers the individual comfortably in the middle of cushion * The ISOFLO Memory Control unit locks air into each of the four compartments providing stability by minimizing side to side and front to back motion * Adjustable to individual Cushion includes cover pump repair kit and operating instructions * Cushion is 8 cells wide x 10 cells deep * 3 year limited warranty