The Loyal large coupler is perfect for the larger piping tips.
The large coupler allows you to change similar sizes piping tubes / tips without emptying the contents of the icing bag. This coupler has two pieces, one being the base and the other is the coupler ring.
Size:
Front diameter: 24mm (piping tip must not be smaller than this)
Rear diameter: 36mm (piping tip cannot be larger than this)