Duct Clamp For Nominal Duct Diameter 3 in Product Type Duct Clamp Material Thickness 18 ga Material Steel Overall Length 3 in Inside Diameter 3 in Seal Material Nitrile Weight 0.26 lb Shape Round Standards Not Applicable Outside Diameter 3 in Finish Galvanized Compatible with Series QF Compatible with Brand Nordfab Series QF Maximum Temperature Rating 158 Degrees F