TOTE Oxygen Tank Carrier fits D Cylinder for Wheeled Walker Raised Toilet Seat Heart rate can be expressed Sterilization Heart rate can be expressed as the number of beats per minute or as percentage of your maximum heart rate * The comfortable wear silicone is soft and breathable and the balanced adhesive provides reliability and skin friendliness Carrier for D cylinder * Oxygen Cylinder Holder increased mobility and freedom for individuals who are required to use oxygen and a wheeled walker * Secures to the walker with 2 hook and loop fasteners and a safety buckle strap at the top and a centering strap near the bottom of the walker * Convenient pocket for the wrench * Manufactured and sold under U Patent #6 672 321 *