Specific Gravity (Relative Density) Bench allows easy suspended weighing of samples in water for relative density determinations of aggregates, hardened concrete, bituminous mixtures, refractory brick and similar materials. Bench is sturdy, heavy gauge painted steel and features three 2in (51mm) diameter holes in the top balance platform for weigh-below hook suspension of samples and thermometers. The lower support doubles as a shelf that can be adjusted to fit heavy-duty polyethylene 30 or 44 gallon water tank. (sold seperately). Meets AASHTO T 209 , AASHTO T 166 , AASHTO T 275 , AASHTO T 85 , ASTM D2041 , ASTM C127 , ASTM C20 , ASTM C642 , ASTM C830 , ASTM D1188 , ASTM D2726