FISK Rupture Disk - To fit a 3" Flange -CPV-Material: 316 NI-Not UsedInformation from the tag on the unit:Size: 2 Inch orifice / fits a 3 Inch flange (the photo is a 3 inch flange, just to show you how it will look - flange not included)CPVSer No.: 99981Material: 316 NIRupture Pressure105 PSIG @ 72 degrees F76 Est. PSIG @ 750 degrees FThis item has not been used. The box is a little dirty from sitting on a shelf but the item is in very good condition. Shipping weight: 14 oz. (includes extra packing for extra protection)