99% Alumina Ceramic Balls 1,excellent quality 2,competitive price 3,size:3mm,6mm,13mm,19mm,25mm,38mm,50mm.etc 99% Alumina Ceramic Balls are widely used in many fields, including petroleum, chemical engineering, fertilizer production, natural gas and environmental protection. They are used as covering and supporting materials of catalysts in reaction vessels and as packing in towers. Having stable ...