Supplied complete with thermometer. The capacity is within 10% of the nominal capacity etched on the flask. The thermometer range is +14°C to +37°C in 0.2°C divisions with a tolerance of ±0.2°C. The thermometer with a 10/18 ground joint serves as a stopper. The side tube has a small vent hole near the top and a 5/12 taper cap. (ASTM C-135, D-153, D-233, D-1638, D-1963; ANS K41.1; AOAC)