The Loyal medium coupler is perfect for the medium to large piping tips.
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)
Coupler Ring Size:
Ring 1 - Front diameter: 21mm
Ring 2 - Front diameter: 26mm