4 Inch Ring Polypropylene Felt Filter Bag 1 Micron 4" x 9" Liquid Aquarium Filter Socks Size 3 - Pack of 2 (4" x 9", 1 Micron)

there is not a whole lot of 10 micron socks out there, and this one is great. i just wish it arrived faster than 2 weeks

I ordered this filter sock to filter dinoflagellates out of my reef tank. Works like a charm!

I first tried a 25mu then a 10 mu filter bag nothing filtered the sma partials until I finally tried this 1mugilter bag. Works good.

They put in a metal ring that will rust. Don't buy!This picture was after 3 days use. I saw rust leaching out of the side, so I cut it open to see what was happening.

As others have mentioned, the metal rings rusts after a few uses. Don't use for anything aquarium related.

As others have said....they rust very quickly. Do not buy!