1,Round 2,Waterproof 3,Metallic 4,For meter GYB-100 Roung Meter BoxApplicationTemporary serviceOutdoor AdvertisingSmall customer serviceOther low amperage ... ,100A,120/240Vac,4 jaw1/2”GYB-100C1 Phase,100A,120/240Vac,4 jaw3/4”GYB-100D1 Phase,100A,120/240Vac,4 ... jaw1”GYB-100E1 Phase,100A,120/240Vac,4 ...