The Small Zip Bag is a mesh bag for holding filtration media. It is available in a 32 cm x 14 cm (12.5” x 5.5”) size , easily holds 1 liter of filtration media, and it comes with a convenient corrosion-resistant zipper. It has the smallest mesh size in the Zip Bag line and is capable of holding all Seachem filtration media including resins.