Johnson Pump Aerator Head - 10-1/2" Spray Bar w/Shut Off Valve & Bracket. The overall length 13-1/4" 3/4" barb one shut-off valve with mounting bracket. Specifications for Johnson Pump Aerator Head: Manufacturer: Johnson Pump Color: Black Features of Johnson Pump Aerator Head Overall Length: 12-3/4" 3/4" thru-hull One shut off valve Designed for quick and simple installation Package Contents: Johnson Pump Aerator Head Johnson Pump 90681-00: Aerator Head - 10-1/2" Spray Bar w/Shut Off Valve & Bracket