Recessed Plug, Type Hazardous Location, Application Used for Plugging Up Conduit Knock Outs, Color Silver, Material of Construction Malleable Iron, Conduit Size (In.) 3, Standards UL 886, C22.2 No. 25 C22.2 No. 30, UL Listed for Class I, Division 1 and 2, Groups B, C, D; Class II, Division 1 and 2, Groups E, F, G; and Class IIIFeatures:Conduit Size (In.) -3 Standards -UL 886, C22.2 No. 25 amp; C22.2 No. 30, UL Listed for Class I, Division 1 and 2, Groups B, C, D; Class II, Division 1 and 2, Groups E, F, G; and Class III WARNING:California Residents:This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer and birth defects or other reproductive harm.California proposition 65 warning