As Per IS 2386 (P-III)
Specification : Specific Gravity is the ratio of the weight in air of a
given volume of a material at a standard temperature to the weight
in air of an equal volume of distilled water at the same stated
temperature. The Pycnometer Bottle can be used to test a wide
range of materials from clay to sand and gravel smaller than 10mm.
It consists of 1kg Glass Jar with Brass Cone, Locking Ring and Rubber