Specific Gravity & Absorption of Fine Aggregate Set products are needed and used in testing for specific gravity of fine aggregates. Includes Pycnometer Jar and Top, Conical Mold, and Tamper. The 1qt (0.95L) jar has a screw-on tapered brass top with rubber gasket and pour-hole. The seamless metal conical Mold is 3in (75mm) high with a top inside diameter of 1.6in (40mm) and bottom inside diameter of 3.5in (90mm). The metal tamper is 340g (0.75lb) with a 1in (25mm) face.