Standard Gooseneck Shapes WALL MOUNT GOOSENECK Gooseneck mounts come assembled with a standard 1/2" hub to fit Ark reflectors. This gooseneck comes with a round heavy duty cover plate to fit a standard round bell box. Standard colors available to match reflector Overall Length: 29.50" WALL MOUNT GOOSENECK White, Black,Red,Blue, Yellow,Green, Galvanized , Satin Nickel, Satin Copper.