Tap Washer 3/4" (Pack of 6)
Black Rubber Tap Washers - 3/4 of an Inch
Tap washers were originally sized according to the size of the threaded connection into the bottom of the tap, this means the name of the washer doesn't match up with it's actual physical size.
The Washer Measures 25mm in diameter (1") and has a 3mm diameter hole
This 3/4 inch size of washer is used in many older bath taps.