Full Technical Description: Gray Silicone Material; 1-1/2 Inch (Rsc/Emt/Imc), 1-1/4 Inch (Rsc) Trade Size; 1.66/1.9 Inch (Rsc), 1.74 Inch (EMT), 1.883 Inch (IMC) Conduit Size; Rsc/Emt/Imc Conduit Type; 5 Link(S); LINK-SEAL[R] Brand; Application Wet Location, Corrosive Environment; Hole Size 3/3.5 Inch Dia (Rsc), 3.5 Inch Dia (Emt/Imc); Material Glass Reinforced Nylon (Pressure Plate), Zinc Dichromate Plated Carbon Steel (Fastener); Pressure Rating 20 psig; Temperature Rating -67 to 400 Deg F; Fire Hour Rating 1 HR; Used on Cast/Cored Hole, Steel Sleeve; LSA Model