The Loyal medium coupler is perfect for the medium to large piping tips. It comes with two rings to allow for slightly larger piping tubes and can be used in any sized piping bag.
The medium coupler allows you to change similar sizes piping tubes / tips without emptying the contents of the icing bag. This coupler has three pieces, the base and two coupler rings.
Front diameter: 20mm (piping tip must not be smaller than this)
Rear diameter: 33mm (piping tip cannot be larger than this)
Ring 1 - Front diameter: 21mm
Ring 2 - Front diameter: 26mm