The Thermohauser of America THA83000.19418 is a standard round coupler designed specifically for pastry bags. Made from durable plastic, this coupler allows for easy and quick changes of piping tips without the need to empty the bag. Its secure fit ensures that icing and fillings flow smoothly, making it ideal for decorating cakes, cookies, and other pastries. Lightweight and easy to clean, this coupler is a must-have tool for both professional bakers and home enthusiasts looking to enhance their baking experience.