This pastry tip is essential for filling eclairs and cream puffs. Not dishwasher safe. Made by Ateco. 3 3/4 inches long with a slightly larger than 1/4 inch opening. (This pastry tip is longer than the small and large bismark pastry tubes, and has a larger opening than both.) This pastry tip fits the medium coupler, and we recommend using a coupler with all bismark pastry tubes.