Small Mesh Zip Bag 1 count (12.5"L x 5.5"W) By Seachem
Large Zip Bag Durable Seams & Corrosive-Proof Zipper. 48 cm x 43 cm (19 x 17). Use Instructions: Simply place desired filtration material e.g. Purigen, CupriSorb, etc. and close using the corrosion-resistant zipper.