Ahlstrom1610-1500 Borosilicate Glass Microfiber Filter Paper, 1.1 Micron, Medium Flow, Grade 161, 15cm Diameter (Box of 100)

I use these in a Buchner to cold-filter perfumes I have made in 5 gallon quantities after alcohol has been added to the perfume concentrates. Wonderful product, leaves zero visible suspended solids in final products. Nothing grosser than seeing debris floating around in your new $200 bottle of perfume...or worse, settling at the bottom after sitting on your dresser for any length of time.