OSE medium metal "Y" style water fitting. This fitting will work with either the OSE 7/32" or 1/4" OSE silicon tubing. The inner diameter of the fitting is approximately .095" (2.4mm). Measures approximately .98" (25mm) from top to bottom. Weights are approx 4 grams. The 2nd picture shows the fitting next to a US quarter for size comparison. Quarter not included.
These come in blue, red or silver anodized color.