UniCode Mounting Body, Material: Stainless Steel, Construction: One/Two Device, Mounting: Surface Mount With 3/4 IN Dead-End Hub, Enclosure: NEMA 3, 3R, 4, 4X, Width: 4.06 IN, Standard: Class I Div 2 Group B C D, Class II Div 1 And 2 GROUP E F G, Class III