Use to determine specific gravity for a large variety of semi solid materials and emulsions, such as road oils, road tars, soft tar pitches, and asphalt cements (ASTM D70); drying oils, varnishes, resins, and related materials (ASTM D1963); water and brine (ASTM D1429); and insulating varnishes (ASTM D115). [ST] 24/12 joint. Short-length stopper has a conical underside and a hole approximately 1.6mm (1/16") in diameter to allow air to escape.