Mkbp-g500-12 Bilge Pump 12v 500gph Ship Submersible Fish Marine Boat Electric Bilge Water Pump Small size, high efficiency, low current (low cost switching power supply supporting); to achieve a small size perfect combination of high flow Unique automatic "discharge" function can bear the long-term continuous operation under nearly congestion condition Impact resistant ABS housing Heavy duty motors with stainless steel shafts and tough. thermoplastic bodies submersible bilge pumps are tough enough for any bilge 500GPH