Plumbing compression olive / ring to suit old 3/4 inch copper pipe (popular before 1972). Can be used as a conversion olive inside a metric 22mm compression fitting to reduce it to the slightly smaller 3/4 inch size.
The old British imperial 3/4 inch copper pipe measured approx 0.844″ / 21.43mm outside diameter (3/4 inch referred to it's nominal inside diameter / bore).
This olive only suits the old British imperial pipe (other countries, like Ireland and America are different).
May be supplied in copper or brass, depending on what our supplier sends us.