nipple? I could not find the size of the part on the manufacturer's HP, but tried purchasing for the sake as well. By the way, in actual measurement, the total length was 31.7 mm, the height was 21.5 mm, the width was 15.3 mm, the inner diameter of the nipple part was 2.7 mm, the maximum outer diameter was 5.6 φ. Through water, it seems to be usable without leaking. However, the knob of the valve is pretty hard, you need to hold the main body firmly and turn it. It can be said to other manufacturers, but I may be looking for different uses, I want you to note the size.