Hydrometer Proof Ranges as follows and are being sold as a set:
Qnty, Range, Supplier, Maker, NIST#
1x 0-20, VWR, Veegee Hydrometer, NIST Circular 555
1x 60-80, VWR, Veegee Hydrometer, NIST Circular 555
2x 75-95, VWR, Veegee Hydrometer, NIST Circular 555
1x 80-120, Cynmar, Chase Instrument Compay, NIST Circular 555
1x 165-185, Cynmar, Chase Instrument Compay, NIST Circular 555
1x 185-206, Cynmar, Chase Instrument Compay, NIST Circular 555
2x 0-200, Cynmar, Chase Instrument Compay, NIST Circular 555