NEW This plastic and metal, T12 board for the pulsator controller has an adjustable-rate and ratio. This is a replacement board for a Surge pulsation controller. The input is 24 volts AC and the output is 24 volts DC. The board measures 1 5/8" wide by 7" long, and is 2 1/2" high. The manufacturer is unknown. The part number is 2590705.