PYREX® Kolmer Graduated Centrifuge Tube with Beaded Rim, Corning®
These PYREX® conical centrifuge tubes are used in connection with the Wasserman test
Also used to measure H2O content and potassium ions in oil and muds. API RP 13B standard testing method. They are graduated in 0.1 mL divisions up to 4 mL, and 0.2 mL divisions from 4 to 10 mL. Tolerances: to 0.5 mL is ±0.02 mL; 0.5 to 2 mL is ±0.04 mL; over 2 mL is ±0.1 mL. Graduations are durable white enamel.