3pcs ColorSwirl Tri-color Coupler Icing Piping Bag Converter Baking Cake Cupcake Cookie Cream 3-color Decorating Tool Suitable for Large size Russian Piping tips Suitable for Large size Russian Piping tips, round bottom dia about 1.46 inch(Dia.3.7CM). Material:PVC . Made of food grade material. Easy to clean and use The ColorSwirl 3-Color Coupler Decorating Kit has everything you need to get started. Use the ColorSwirl 3-Color Coupler to seamlessly blend 2-3 color icings as you pipe. The interlocking coupler pieces connect multiple decorating bags, allowing you to swirl 2 or 3 colors together with one simple piping motion. Choose from double swirl or triple swirl colors. Package include 3pcs ColorSwirl Coupler.