Use this Plastic 2 Piece Coupling Set from Winco to securely hold pastry tips on the end of a pastry bag. Ideal for fast-paced food service establishments, this tube coupling allows you to change standard-sized tubes to small tubes without the need to empty the contents of your decorating bag. Also, with its plastic construction, this cake decorating tube coupling is easy to clean and will withstand heavy-duty use. This set comes with 2 pieces of tube couplings.