61 in, Clamp Maximum Inside Diameter 1 21/32 in, Clamp Minimum Inside Diameter 1 31/64 in, Fastener Housing Material EMT, For Maximum Outside Diameter 1 21/32 in, Grade General Purpose, Maximum Operating Temperature 800 Degrees F, SAE Number Not Applicable, Screw Material Stainless Steel, Screw Material Finish Not Applicable, Screw Material Grade 301.