Ranges shown below are for an out-flow time of 200 seconds except size 25. The minimum time for 0.5 centistokes viscosity should be 250 seconds. Tubes comply with ASTM D 2515 and are used to obtain kinematic viscosities by ASTM D 445. Certificates of calibration are not supplied with this product. Reference No. ASTM D 2515 and ASTM D 445
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