4" submersible well pump. Stainless steel motor shell and drive shaft with cast-iron discharge. Quiet and economical operation. Submersible pumps are rated on the average number of gallon delivered per minute to the well head from various water level depths. This model is rated at 5 GPM. Star Water Systems use contractor recognized water lubricated Franklin Electric motors. Heat-shrink splice kit included along with illustrated installation instructions. . 1 year limited warranty.