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This is the 47mm Filter Paper, 0.45 micron, 100 pk for the Field Suspended Iron Test Kit and the Babcock and Wilcox Suspended Iron Test Kit. These same filters are used for most Silt Density Index (SDI) Test Kits.
Part Number: RDFP-0045-47
Prices for the Continental 48 states of the USA only.
Related Numbers: 56A007690, 1215281, SDI-045, SDI-2000, 500-P0416.88, RASDI045H