Square Patch Fittings ENOX Square Patch Fitting EPF - 401 AEPF - 401 A Top Patch (Square) ENOX Square Patch Fitting EPF - 402 AEPF - 402 A Bottom Patch (Square) ENOX Square Patch Fitting EPF - 403 AEPF - 403 A Overpanel Patch (Square) ENOX Square Patch Fitting EPF - 404 AEPF - 404 A Overpanel ‘L’ Patch (Square)