Used for finding specific gravity of hydraulic cement. Made from borosil glass. The flask is 243mm in total height, having a bulb of 90 mm dia of 250ml approximate capacity. The long neck of the flask has at top a funnel of 50mm dia in which fits a ground glass stopper. The neck has over-all 11mm i. D. Upper portion is graduated from 18 ml to 24ml with 0. 1ml graduation. Just at the bottom of the neck 1ml capacity is marked in between there is 17ml capacity bulb.