Introducing the Seachem Laboratories Large Mesh Filter Bag with Zipper, sized at 19 x 17 inches (48 cm x 43 cm). This white filter bag features sturdy seams and a corrosion-resistant zipper for long-lasting use. Perfect for holding biomedia like Matrix, it offers a hassle-free design with no need for strings or ties. Ideal for aquarium filtration needs, this durable bag ensures secure containment and easy access. Find this reliable product and more at shop.morphmarket.com.