Mini power packs Standard "UPW-STD" - PT 1/4 "G - Motor 12V DC - 1800W with contactor and thermal protection - Pump 1P3,3 - valve check - pressure relief valve adjustable - With pressure switch connection 1/8" G - steel tank 23 lt. (Mounting brackets on the tank) - Mounting horizontal "OR" - Headset motor protection.