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They are available only in pleated format
Grade 121 is recommended for the clarification of liquid suspensions loaded with fine particulates
This grade uses the same acid-treated glass microfiber media as Grade 193
This popular grade offers finer particle retention and higher flow rate than traditional analytical filter papers
Glass Microfiber Filter Paper - 169W-0470 - Grade 169, 4.70cm 111 They are available only inAhlstrom Munksj 169 1. 0 m, Fast Speed This glass microfiber grade is a smooth surface, binder free filter with unique high temperature resistance. It offers fine particle retention and product stability to over 500 degrees Centigrade. The temperature resistance makes Grade 169 well suited for suspended solids determination, volatile solids testing, air pollution testing, and related EPA and ASTM protocols. (100 circles box) Grade 169 for STM2540 E
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