Pure rubber, non-blooming. For use with pipettes, dropping tubes, etc. Walter Stern
Natural rubber atomizer bulbs with 4" tubing on one end. Valves are on both ends. Capacity of 75ml. Walter Stern
Constant pressure rubber bulb consists of two 200ml rubber bulbs, one with check valves and the other with a net to prevent over expansion and to allow continuous air stream. Walter Stern
Rubber Gas Collecting bulb produces pressure or suction with valves of hard rubber and connecting nipples at both ends. Approximately 75ml capacity. Walter Stern
