A blowing agent powder of kaolin characterized in that the blowing agent kaolin ore grinding mill the pulverized fine particles of Pyro Tools Ball Mills Heavy duty rubber drum is both spark and leak proof These mills are designed for quiet and continuous operation are fan cooled and include extra drive belts Choose either 3 lb or dual 3 lb capacity to suit your needs Approximate Attributes 3 lb 4 3 4 H x 4 1 2 Diameter Dual 3 lb 14 3 4 L x 6 1 2 W x 4 3 4 H Motor 120 V 60 Hz on off switch