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This is a bulk 20-pack of 400 GPD reverse osmosis membranes from Membrane Solutions.

They're the ROULP-3012-400 model, designed to fit standard 2812/3012 residential RO membrane housings.

Great for home drinking water systems, or even for maple syrup producers using RO.
They remove 99% of TDS with a 97% salt rejection rate.
NSF/ANSI 58 certified.

Made from polyamide, blue color.

1-year warranty.

4 out of 5