Citracal® Max Calcium Vitamin D Joint Health Supplement, 1 Bottle Vital Signs Monitor Accessorie 20 X 18 * The 10883 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 Anodized aluminum is sturdy and lightweight * Armrests provide additional comfort and support * Powder coated aluminum bracket easily attaches frame to toilet * Arms are height and width adjustable * Limited Lifetime Warranty * Retail boxed * Weight capacity 300 lbs Adequate calcium and vitamin D throughout life each dose contains: 500 IU vitamin D (as cholecalciferol) and 630 mg of calcium