Halex 1/2 in. Knockout Seal (3 1 2 Weatherproof Knockout Seal
COREX 1/2" Oil Tight/Weather-Resistant Hole Seal - Knockout Seal - Garvin Industries 1-½" deep, 4" weatherproof fan rated boxes with (4) ½" side knockouts and (5) ½" Flexible conduit and weatherproof boxes. UL listed Box spacer connectors for 2" gap spacing are used as a short raceway to connect electrical junction boxes or enclosures 2-1/2 in. Oil-tight Knockout Seal with Gasket ...