H-B DURAC 50/56 Degree API ASTM 31H Hydrometer (B61893-1200)
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<b>[Product Information]</b><br>
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<li>Range: 50 to 56°; accuracy: 0.1°API; temperature of standardization 60°F/60°F</li>
<li>Length: 163mm (6.4 inches); ASTM number: 31H</li>
<li>Features readings in 0.1 divisions and a metal ballast</li>
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