Whatman 1821-042 Filter Circles, 42.5mm Dia, Binder Free Grade GF/B, 100/pk (PN:1821-042)

GF/B 4.25CM 100/PK
Glass Microfiber Binder Free Grade GF/B circles, 42.5 mm, 100/pk. Three times thicker than GF/A with higher wet strength and significantly increased loading capacity. Combines fine particle retention with good flow rate.

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