... in difference size 0.3-1mm 0.5-1.5mm 1-2mm 1.5-2.5mm 2-4mm 0.3-0.6mm ) with 5.5-10times expansion ratios ... -30um,0.3-0.65mm,0.65-1mm 20-40mesh,10-40mesh, ,0.3-1mm1.5-2.5mm,1-2mm,2-4mm,3-8mm,4-8mm,16 ... ,325mesh,400mesh Raw silver vermiculite0.25-0.7mm,0.3-1mm,1-2mm,2-4mm,3-8mm,4-8mm,20-40mesh,40-60mesh Special ...