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Whatman 1820-047 Glass Microfiber Binder Free Filter, 1.6 Micron, 4.3 s/100mL Flow Rate, Grade GF/A, 4.7cm Diameter (Pack of 100) auspowers_batchone Quality power transmission belts atWhatman 1820 047 Glass Microfiber Binder Free Filter, 1. 6 Micron, 4. 3 s 100mL Flow Rate, Grade GF A, 4. 7cm Diameter (Pack of 100) These GF A glass microfiber filters offer fine particle retention and high flow rate, as well as good loading capacity. Used for high efficiency general purpose laboratory filtration, including water pollution monitoring of effluents, for filtration of water, algae and bacteria cultures, foodstuff analyses, protein