shijiazhuang runcang mining co ltd was established in 1999. it is located in shijiazhuang city.hebei province,which is famous for vermiculite and shale piece  in the world. our products are ranged from 325 to 8000  mesh .   specialish in vermiculite expanded vermiculite ,mica ,shale, Vermiculite and expanded vermiculite 1. Size: 20-40mesh, 40-60mesh, 0.3-1mm, 1-3mm, 2-4mm, 3-6mm, 4-8mm