Fits 5 sizes of tubing and will act as straight connector for the same size tubing on both ends, or will act as a reducer for any combination within the range. The inside diameter increases with notch size when needed length is cut off for unrestricted flow. These molded polypropylene connectors are steam autoclavable at 121°C (250°F). 90mm (3-1/2") long. Ring diameters are 14, 12.5, 11, 9.5 and 7.9mm (9/16, 1/2, 7/16, 3/8 and 5/16").