Galvanized panels are 12 gauge. Panel with any side over 20.00" has 3/4" flange on all sides. Optional "G" panels have a conductive finish (no paint). Panels fit the following enclosures: NEMA 1, Large (NIC); NEMA 3R, hinged Cover (RHC, Large); NEMA 4, 412, & 4X Single Door (N12, N4, N412, SSN4, SSN43PT, SSN43PTW); NEMA 12, 2-Door Wall-Mount (WAWF), Single Door; Right Flange Disconnect (SDN12, ABM12); Large JIC (B-CH, Large) Single door N12.