2 PCS MARINE BOAT BLACK RUBBER JUMBO PRIMER BULB HOSE FOR OUTBOARD FUEL TANKS This is a set of 2 black rubber jumbo primer bulbs for outboard fuel tanks. It fits with 3/8" hose. The primer bulb and hose allow greater fuel flow to maximize performance. Compounded to accommodate today's alcohol-enriched gasoline blends. Item: P40061X2