The Loyal Medium coupler is perfect for the medium to large piping tips. This coupler has three pieces, the base and two differet sized 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