Coupler-for-Decorating-BagA coupler consists of a base and a ring used to attach a decorating tip to a decorating bag. The coupler base fits into a decorating bag, and the decorating tip fits into the ring; the ring is then screwed onto the coupler base. It saves time by enabling you to change decorating tips while still using the same decorating bag.
Also see
Nozzles, Piping Bag, Piping Syringe.
