Electric Cable Hatch – Black, Everything you need for a fast easy installation – gasket and screws included. No messy putty tape for most installations Accepts 15, 30, and 50 amp cords and plugs. Fits 3″ and 3-1/2″ diameter cut-out. Diverts water away from opening. Protects plug and RV wall. Covers holes and marks from most other hatches. No visible screws. Study polypropylene construction. Stands up to rough weather and resists sun fading.