HOCUS&trade; Colorswirl 2-color Coupler Decorating Kit, 12-inch Nonstick Reusable Decorating Piping Bags with Double Icing Piping Coupler, Cake Snack Cupcake Dessert Baking DIY Decorating Set Decorating set includes: 2 piping bags of 12" long, 1 coupler of 2 color Smooth interior for easy squeezing, rough exterior for better gripping Interlocking coupler pieces for seamless 2 color icing swirls; Reusable and durable decorating bags for times of using Piping bag of 12-inch size is perfect for projects featuring several icing colors Ideal for making cakes, cupcake, biscuit, cookies, chocolate, pie, dessert, snack, etc.