UL Extra Duty Compliant (for Wet Locations, National Electrical Code 406.9 (B)(1)) with a patented multi-configuration design, NEC Compliant, UL File No. E362580 Gang can be used horizontally or vertically, with up to 18 configurations, wheter GFCI, Duplex, Switch, or Round Durable polycarbonate construction, Lockable and easy to install, includes gasket and mounting hardware, fits full size padlock. 3-1/4" deep, Clear/Gray. Cross Reference: MM410C + MM710C / 30919 / 30920 / WIUC10FRED