Pair Of Y-Shaped Laboratory Glass Stopcocks

Pair of laboratory glass stopcocks of differing designs, each with three Y-arranged sidearms, a ground-glass plug and a curved glass handle. One has thin, straight sidearms; the other has thicker arms tapering towards the ends. Signs of use and storage, with cloudy surfaces and localised deposits. Detail props for laboratory and chemical industry sets. Operation and leak-tightness have not been tested.