空氣採樣濾紙EPM2000 Whatman® Glass Microfiber Filter,EPM2000 孔徑2.0um,厚度0.45mm 每盒(bx)100張 ITEM NO DIA(mm) PORE SIZE(um) WHA1882-047 47 2.0 WHA1882-866 8" * 10" 2.0