Cake Decorating Coupler Set - 7 pieces. This Ateco 7-piece large plastic coupler for small - large tips allows you to interchange any small, medium, medium-large, or large-sized piping tips with absolute ease! Even though all reusable bags can accept small decorating tips without a coupler, this convenient item enables you to swap out any other sized piping tips, except for extra-large tubes, without having to empty the contents of your decorating bag, which saves you time and labor. This versatility ensures that there will be no need to slow down, providing more time to decorate and requiring less time to prepare. To use this coupler properly, simply trim your reusable bag before use! This item can accommodate any Ateco pastry tubes with a base diameter of 1/2" - 1 1/2". In addition, ridged edges on the ring allow you to easily assemble the coupler to the base with minimal effort. Constructed of high-density polyethylene, this coupler provides durability and long-lasting use. For added convenience, this set includes a cap, ensuring mess-free storage and simplified transport. Ideal for bakeries, cake decorators, coffee shops, and anywhere else you need to decorate baked goods, this plastic coupler will get the job done! Overall Dimensions: Top Diameter: 7/8" Bottom Diameter: 2 1/2'' Height: 2 3/16''. Kit Includes: - (1) coupler base - (1) small coupler ring - (1) medium coupler ring - (1) medium large coupler ring - (1) large coupler ring - (1) storage cap