... years professioanl manufacture 2.ISO9001:2008 3.Size:3,6,10,13,19,25,38,50mm Inert Ceramic Ball of Size ... 3,6,10,13,19,25,38,50mm XINGFENG Catalyst bed support media ... /2''(13mm)>185>1.853/4''(19mm)>487>4.871''(25mm)>850>8.51-1/2''(38mm)>1200>122''(50mm)>5600 ...