Full Technical Description: Black EPDM Rubber Material; 1/2 Inch Trade Size; 0.815 Inch Conduit Size; IMC Conduit Type; 4 Link(S); LINK-SEAL[R] Brand; Application Wet Location, Corrosive Environment; Hole Size 2 Inch Dia (Rsc/Emt), 2/2.5 Inch Dia (IMC); Material Glass Reinforced Nylon (Pressure Plate), Zinc Dichromate Plated Carbon Steel (Fastener); Pressure Rating 20 psig; Temperature Rating -40 to 250 Deg F; Used on Cast/Cored Hole, Plastic/Steel Sleeve; LSA Model