The EZ cup formula for each cup of the series matches the applicable ASTM formula in D 4212 at the recommended calibration level. EZ Cups are compatible to ASTM D 1084 Viscosity of Adhesives and ASTM D 816. Conversion tables that relate to drain time in seconds (to the nearest tenth second) to viscosity in centistokes are furnished with each EZ Cup. EZ Cup calibration is traceable to NIST. Calibration and Certification procedures qualify under MIL STD 45662A, ISO 9002. The EZ Cup is not matched by any other cup of its type, with respect to the advantages listed above, in quality of workmanship or in continuing quality control procedures. The finest, most reliable, calibrated and documented cup on the market.