Specific Gravity & Absorption of Fine Aggregate Set includes pycnometer with conical mold and tamper. Pycnometer is 1 qt. (0.95 liter) threaded glass jar with a rubber-gasketed brass top tapered to 0.125″ (10mm) hole at top. Mold is 40mm ID at top, 90mm at bottom, 75mm H. The 340g tamper has 25mm face. 90-1755-00 Vibro-Deairator removes air bubbles and is purchased separately.