Delish Treats 3 Color CouplerDelish Treats 3 Color Coupler Create colorful decorations in three color designs in one motion. Pipe three colors of icing at once to easily decorate fun, colorful cupcakes, cakes and sweet treats. Includes three interlocking coupler pieces that are placed in decorating bags. The ring holds the decorating tip secure while piping. Fit for nozzles with 2. 5 3cm diameter.