Full Technical Description: Black EPDM Rubber Material; 1-1/2 Inch Trade Size; 1.9 Inch (Rsc), 1.638/1.883 Inch (IMC), 1.74 Inch (EMT) Conduit Size; Rsc/Emt/Imc Conduit Type; 5 Link(S); LINK-SEAL[R] Brand; Application Wet Location, Corrosive Environment; Hole Size 3.5 Inch (Rsc), 1.74 Inch Dia (EMT), 3/3.5 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