Wilton Three Colour Coupler This three colour coupler allows to create two or three tone buttercream swirls on your cakes, cupcakes and sweet treats. Nozzles suitable to use with coupler: Wilton 1M, Wilton 1A, Wilton 2C & Wilton 4B. Alternatively you can use JEM 2D (2C) & JEM 172 (4B). To Use: Simply place your coupler pieces into three individual piping bags (minimum 12\") and fill with your different coloured buttercreams.  Holding the three pieces together, place your chosen piping nozzle onto the couplers, and complete by twisting the ring over the top. This will allow you to pipe three tone buttercream swirls on your cakes and cupcakes!