Cytiva - Whatman 1004-185 Grade 4 Filter Paper
18.5cm diameter. For rapid filtering with excellent retention of coarse particles and gelatinous precipitates. Good rapid filter for cleanup of biological fluids or organic extracts. For air pollution monitoring. Coarse porosity. Fast flow rate. 20-25um particle retention. Exact Match 28460-142

Cytiva - Whatman 2200-185 1 PS Water Repellent Phase Separating Paper
18.5cm diameter. Silicone impregnated paper functions as a rapid phase separator in place of conventional separatory funnels. Paper retains aqueous phase and passes through hydrophobic phase. Medium porosity. Medium flow rate. 11um particle retention. Exact Match 28491-180

PAPER FILTER Qualitative High Purity Grade 613 18.5 cm circle 100/pk Exact Match 71440-016

Ahlstrom-Munksjo Filtration LLC
Mfg Item # : 5050-1850
Ahlstrom manufactures high quality analytical filter papers for use in specialty end use applications. These custom designed qualitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water. Ahlstrom specialty analytical filter papers include pleated and non-pleated grades and are found in applications such as seed, asphalt and beer testing. All grades are manufactured in a strictly controlled environment that ensures high uniformity and high purity from filter to filter. Key features Qualitative analysis Low ash content 0.06% Untreated Consistent performance Wet-strengthened  grades available Custom designed for  end-use application Custom cut Bulk packaging Ahlstrom offers a full range of standard pleated grades that meet your needs from grades with rapid flow rates for filtration of viscous materials to grades with tight matrices for removal of fine precipitates. Ahlstrom’s pre-pleated grades can save valuable time and maximize the efficiency of the laboratory filter system. Pleating improves the effective surface area increasing flow rate and loading capacity thus decreasing filtration time. Pleated circles are available in 12.5cm to 50cm diameters.

Advantec MFS Inc.
Mfg Item # : N023118.5CM
Advantec Qualitative Filter Papers are made of 100% cotton linter cellulose. Primarily used for clarifying and removing precipitates (ppt) and preparation for quantitative analysis. These papers can be used over a pH range from 0-12 and a maximum temperature of 120°C. Ash content of 0.1%. Papers have smooth surface, normal hardness (except Grade No. 101 have a creped surface). Grade No. 1 Retains coarse and gelatinous ppt with fast flow rate. Recommended for gas filtration, air pollution analysis, and general purpose. Nominal Retention: 6 µm. Grade No. 2 Retains medium crystalline ppt with high flow rate. General purpose filter. Nominal Retention: 5 µm. Grade No. 231 Retains crystalline ppt, moderate flow. Thin and slightly more retentive than No.1 general purpose paper. Nominal Retention: 5 µm. Grade No. 232 Collects medium to medium-fine ppt. Slow flow rate. Thin retentive paper. Nominal Retention: 3 µm. Grade No. 131 High retention efficiency for fine crystalline ppt like BaSO4. Slow flow. Higher wet strength and will withstand suction. Nominal Retention: 3 µm. Grade No. 235 Highest retention efficiency collecting very fine ppt. Very slow flow rate. Nominal Retention: 1 µm. Grade No. 101 Creped filter paper captures large particles. Fast flow rate. Excellent for seed germination and viscous fluids. Nominal Retention: 7 µm. Please Note: ALL Advantec items have a maximum 48 hour cancellation window. Any cancellations AFTER the 48 hour window will incur a restocking fee equal to the cost of the product.

VWR International 28313-126
VWR* Grade 417 Filter Paper, Qualitative, Crepe 18.5cm diameter. Good for rapid filtrations where fine particle retention is not required. Coarse porosity. Fast flow rate. 40um particle retention.

Cytiva - Whatman 1450-185 Grade 50 Quantitative Filter Paper, Low Ash
18.5cm diameter. Thin, smooth, hardened, paper has high wet strength. Retains fine crystalline precipitates. For qualitative or quantitative filtrations requiring vacuum assistance. Withstands scraping. Fine porosity. Slow flow. 2.7um particle retention. Exact Match 28485-143

Cytiva - Whatman 1003-185 Grade 3 Filter Paper
18.5cm diameter. Slightly grained surface. Moderately thick. Highly absorbent. Highly suitable for use in Buchner funnels. Medium porosity. Medium flow rate. 6um particle retention. Exact Match 28456-145

Cytiva - Whatman 1202-185 Grade 2V Folded Filter Paper
18.5cm diameter. Widely used for general purpose filtration. For general chemistry and soil analysis methods. Medium porosity. Medium flow rate. 8um particle retention. Exact Match 28465-066

Cytiva - Whatman 1213-185 Grade 113V Folded Filter Paper
18.5cm diameter. For coarse particles and gelatinous precipitates. Thick and strong. High loading capacity. High wet strength. Creped surface. Not for nitrogen determinations. Coarse porosity. Faster flow rate than other qualitative grades. 30um particle retention. Exact Match 28297-274