Borosilicate glass vessels, Offset Adapter, Coupling and Modified Top Bottle Clamp for use with 7482 Shaker Type Parr Hydrogenation / Gas Apparatus I to allow temperature measurement while connected to hydrogen source. For use with three larger vessels only, with #25 Screw thread neck. Working capacity is ½ of the actual capacity, listed below. Thermometer probe can be inserted through AceThred bushing.