2" Flat Gaskets designed to work with pump housings, unions, split nut unions and 1 piece PVC unions. You are getting a pair of flat gaskets. This helps to assure a tight drip free seal every time. Measurements Inner Diameter: 2.0" Outer Diameter: 2-15/16" Thickness: 1/8"
We recommend our o-ring gaskets for heater unions and split nuts.