*Pack of (5) 4" Filter Bags, 200 Micron, Made in the USA

Five 4 inch Filter Socks (4" diameter, 13" long, 200 micron) Polyester Felt, Sewn construction, Glazed Finish with 4" ring. Filter socks are the most convenient form of mechanical filtration. They remove excess food, detritus, organic waste, dust, and other particulate. Removing these particulate from the water column will reduce the amount of organic matter that produces ammonia and other undesirable substances in the aquarium. Filter socks also help prevent larger objects, such as sand, crabs, snails, etc. from damaging pump motors. Regular filter sock use will lower organic levels and result in CRYSTAL CLEAR WATER! These filter socks are very high quality and made in the USA.