GROCO Hull Strainer w/Access Door 3" Max Thru-Hull Perforated. Perforated Hull Strainer with Access Door 3" Max Thru-Hull Specifications for GROCO Perforated Hull Strainer w/Access Door 3" Max Thru-Hull: Manufacturer: GROCO Color: Black Features of GROCO Perforated Hull Strainer w/Access Door 3" Max Thru-Hull Access door design allows easy access to Thru Hulls C84400 bronze body and door Cast filter slots Pressure relief holes in door casting Package Contents: GROCO Perforated Hull Strainer w/Access Door 3" Max Thru-Hull GROCO APHS-3000-1: Hull Strainer w/Access Door 3" Max Thru-Hull Perforated