Feature●Sci-Supply is an American small business based in Southwest Ohio and has been proudly serving our customers since 2004. Get high quality products and exceptional customer care while supporting a small American business. We go the extra mile for YOU!●Sci-Supply qualitative grade filter paper is perfect for all of your laboratory needs●It comes in a variety of sizes to suit multiple applicationsDescription Sci-Supply qualitative grade filter paper is perfect for all of your laboratory needs. It comes in a variety of sizes to suit multiple applications. Select size from the drop down menu underneath the add to cart button. Box of 100 circles. Speed: Medium Retention: 10 Micron.