We are offering sand absorption cone. sand absorption cone and tamper:- used for determination the slump of fine aggregate in the determination of bulk and apparent specific gravity and absorption of fine aggregate. specifications: the equipment comprises of a conical metal mould 1.5 inch dia at the top, 3.5 inch dia at the abse and 2.7/8 inch in height. A metal tamping rod weighing 12 ounces and having a flat circular tamping face 1 inch in diameter.