Type 3R Rated For Protecting Time Switch From Rain, Sleet, Snow And Ice Drawn Steel With Gray Powder Coat Paint 0. 036 Inch Heavy-Duty Construction With Side-Hinged Door Hasp Provided For Lock Combination ½ Inch - ¾ Inch Nominal Knockouts: One On Back And Each Side Of Enclosure, And Two On The Bottom Separate Grounding Terminal Convenient Mounting Holes Available For: Series: T100, T170, T180, T1100, T1200, T1400, T1900, T2000, C8800, Et100C, Et170C, Et700C Models: Eh10, Eh40, Et279