The 4 Size Coupler and Cap is a great addition to any bakery, cafe, catered event, restaurant and more. The Coupler makes it easy to interchange 4 different sizes of tubes (over 250) without emptying the contents of the bag. Decorating a cake has never been simpler, with the help of the Coupler, easily go from a large tube to a small tube in seconds. There is no need to have multiple frosting batches or empty the bag for various tube changes as the Coupler accepts small, medium, medium large and large tubes. Constructed out of durable high density polyethylene. - Plastic; white - Sold per each