Seachem Laboratories Mesh Filter Bag with Zipper White 1ea/12.5 In X 5.5 in, Medium-Mesh

Spacious Zippered Mesh Bag with Strong Seams & Non-Corrosive Zipper. Measures 48 cm x 43 cm (19 x 17 inches). Perfect for holding biomedia like Matrix, with no need for strings or ties.