... : 0.35-1mm,1-2mm,1.4-4mm,4-8mm. Vermiculite has already been used in many fields like construction materals ... , forage ,cultivation, pharmacy ,fractioning and sealing ,metallurgy,etc. Specifications of Expanded Vermiculite:6~12mesh3~6mesh2~4mesh1~3mesh16~40mesh20~40mesh40~80mesh60~100mesh200mesh325mesh400mesh horticultural ...