Heathrow Scientific 67134H ASTM Specific Gravity Hydrometers, ASTM 134H, 1.450 to 1.500, 0.001 subdivisions, 260 mm, 1/pk Dimensions_86.6 x 66.9mm The easy-to-read LCD display features

The easy-to-read LCD display features a back light with auto shutoff to conserve battery life

Security lock

GC90 125MM 100/PK

Easy to clean with only three parts to disassemble

Heathrow Scientific 67134H ASTM Specific Gravity Hydrometers, ASTM 134H, 1.450 to 1.500, 0.001 subdivisions, 260 mm, 1/pk Dimensions_86.6 x 66.9mm The easy-to-read LCD display featuresASTM Specific Gravity Hydrometers are calibrated at 60F and manufactured to the specifications of the American Society for Testing and Materials (ASTM). Select the hydrometer that you need by matching the ASTM number shown. Specific Gravity, also known as relative density, is the ratio of the mass of a liquid to the mass of an equal volume of distilled water.