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specific_gravity_bottle
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Description

The B5501 (Hubbard) featuring a straight side is for determining the specific gravity of road oils, tar, asphalt and cement. The solid stopper has a hole approximately 1.6 mm in dia. through the center to allow air to escape. The B5511 (Hubbard-Carmick) features a tapered side utilized for determining the specific gravity of viscous and semisolid bitumen.