Ahlstrom Grade 121 is a very thick binder-free microfiber glass filter paper that offers finer particle retention than Ahlstrom 111 with higher wet strength and loading capacity. Flow rate: medium. Retention: 1.0 microns.
Replaces : B4250
Cross Reference By Products Name :
Advantec GB-140
Whatman GF/B
Cross Reference By Catalog Number
Millipore : APFB 042 00
Fisher : 0980442B
LabFilter : B4250
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