Helps reduce the hardness of your RV or boat's water. Premium ion exchange resin replaces minerals such as magnesium and calcium. The compact design features a convenient carry handle, a large mouth opening to add salt, and a garden hose plug and cap to keep contents secure during transportation and storage. Includes: ready-to-use water softener, 50 test strips, 4' hose and male-to-male hose fitting for regeneration. Product regenerates with 2 boxes of common table salt (not included). For external use only. GPM Up to 4 GPM Size 8-1/2" Dia. x 20-1/2" H