Cheap And Discounts 100Pcs/pack Fast/Medium/Slow speed qualitative filter test paper Dia 7cm/9cm/11cm/12.5cm/15cm/18cm for lab funnel use Wholesale. Buy Directly From Merchant High Quality and Low Price Labware Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.