Full Technical Description: Black EPDM Rubber Material; 3/4 Inch (Rsc/Emt/Imc), 1 Inch (EMT) Trade Size; 1.05 Inch (Rsc), 0.922/1.163 Inch (EMT), 1.029 Inch (IMC) Conduit Size; Rsc/Emt/Imc Conduit Type; 4 Link(S); LINK-SEAL[R] Brand; Application Wet Location, Corrosive Environment; Hole Size 2.5 Inch Dia (Rsc/Imc), 2/2.5 Inch Dia (EMT); 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 Sleeve; LSA Model