Vintage Medical Glass Tubing Connectors Equipment Lot Of 4 Pieces. The single piece with the ridges, whose diameters are not consistent with each other and appears to be mouth blown glass, is about 4” long, the 3 offset pieces with a little barb on the narrow end are roughly 3” long. We do not know what these came from, but they came out of a small medical cabinet that was filled with other supplies that had dates from the early 1920s through the 1940s. Have wear from use and handling, have been wiped off with a damp cloth but otherwise have not been cleaned. Look at all pictures as they are part of the description and may show more about the condition than what is in the written part.