Sunset Healthcare Humidifier Connector, 1 Pack of 10 Aquatic Therapy Box includes: Opera pump body Style:Pair (Left & Right) Box includes: Opera pump body 2 Breast shields (24mm) 2 Breast shields (27mm) 2 Bottles (150ml) with caps disks and covers 2 Air tubes 2 Diaphragms 2 Diaphragm caps 1 AC adapter 1 Instructions manual Set contains 1 each of the following: 2 4 7 11 15 lb * Unique texture is easy to grip grasp and throw * Softness of ball enhances grasp * Balanced uniform weight * Use for upper body rehabilitation and fitness exercises * Designed to throw against plyometric rebounders * Color coded to easily identify weight Attach a humidifier to most continuous flow oxygen concentrators