3 Inch Gasket for Western Pottery tank to bowl. Fits all new style tanks. Octagon shape (8 sides) on one side. This is an Original Equipment Manufacturer (OEM) part specifically for Western Pottery toilets.
Note: There are two ways to confirm you are ordering the correct part: 1) lift the flapper and measure the hole, if is 3 inches this is the correct part. 2) remove the tank, if the nut has 8 sides this is the correct part.