Our Mesh Media Filter Bag 5 Pack is designed for marine aquarium enthusiasts who value quality and versatility. Each bag measures 6" x 4.25" of nylon mesh. The zipper will not rust, making it safe for saltwater environments. This product is a versatile media mesh bag that can be used to hold various types of filter media. It is the perfect addition to your aquarium filtration system, providing efficient and effective filtration. Get your Mesh Media Filter Bag 5 Pack today and experience the benefits of superior filtration in your aquarium. Comes in Black or White.