Set Of Four Laboratory Glass Stopcock Adapters With Ground Joints – No. 1

Set of four similar laboratory glass stopcock adapters with large tapered ground joints, rounded transitions and bent tube connections. Wide glass handles, with paper remnants around some stopcock plugs. Signs of use and storage. Detail props for laboratory and chemical industry sets. The two numbered sets contain seven similar items in total, which can be combined into a grouped arrangement. Operation and leak-tightness have not been tested.