Description Good Rebuilt Westfalia-Surge 12 unit Pulsator Control box Operates 12 alternating or 24 single pulsators Rebuilt and tested. Includes new aftermarket pulsation circuit board 115 volts in 24 volts pulsed DC out # 1 seller for past 30 years! Pulsator shown in photo is NOT included but available separately Box may be black or white 8/26