nozzle with ring

Can easily be used with a cheap plastic bag, the ring makes it secure. The diameter of the model is 12mm and the angle is 40°. You can adjust the size and angle by modifying the X, Y, and/or Z dimensions in your slicer. There are 2 sizes of ring, the tall one is better if you print at a reduced size. It is great at holding pressure even at 25% scale.