The ResMed Air Sense 10 Water Chamber 37299 Humid Air Tub Reservoir is a clear plastic humidifier chamber that is designed as a drop-in installation for easy use. With a square shape and dimensions of 5 inches in length, height, and width, this chamber is compact and lightweight at .5 pounds. It is manufactured by ResMed, a trusted brand known for quality medical equipment, and is proudly made in Malaysia. This new sealed water chamber is perfect for adding humidity to your bathroom for a more comfortable environment.