CHMLAB® Qualitative Analysis Filter Paper, General Purpose, Made of High-purity Cotton Linters & Other Virgin FibersDisc- & Sheet-type, Φ42.5~320mm & 580×580mm, Ash Content＜0.06%Ideal for General Fast Filtration, High Wet Strengthened, Batch Traceable, 정성 (DH24CAT00001318)