The Exo Terra Extension Coupling is a great way to connect your Exo Terra monsoon RS400 high-pressure rainfall system to a water pump or other piece of equipment. This coupling features a reversible argyle design that allows you to change directions easily when working on multiple projects at once. The Exo Terra Extension Coupling also measures 1/2 inch in length by 4 inches in width by 7 inches in height and weighs only 0.03 pounds.