... can prevent items from moisture,mildewing and rusting . Featuretype a silica gel with fine pores includes spherica silica with ... spherical particle,massive silica with fine pore is a transparent or tran slucent irregular particBasic quality parametersThe average diameter is ... 2-4mm,4-8mmPacking:25kg/bag nameQD-MAKE Type- A SILICA GELmain functionheat resistance,Moisture proof sex,Mildew degeneration ...