Citracal® Max Calcium Vitamin D Joint Health Supplement, 1 Bottle Vital Signs Monitor Accessorie 20 X 18 * The 16 7136 20 X 18 * 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 Enjoy Thick It Clear Advantage with meals or as a refreshment Adequate calcium and vitamin D throughout life may reduce the risk of osteoporosis