Rule 500The Rule 500 offers many design features while keeping size and cost to a minimum. Especially popular on smaller craft Rule 500 pumps are unmatched in pumping power and longevity. 3/4 (19mm) discharge outlet. 12 Volts DC unless noted.Features:Computerized operation - no floats switch requiredFully SubmersibleEasy clean snap lock strainerSilent and vibrationless operationAnti-airlock protectionCompact efficient long life motorIgnition protectedNo burn-out when run dryRust and Corrosion protectionUsed by leading boatbuilders worldwidemarine grade blocked wiring Product : RULE 500 GPH AUTOMATIC BILGE PUMP 3/4 OUTLET Manufacturer : RULE Manufacturer Part No : 25S UPC : 042237083135