100% Brand new and high quality Material: nylon Color: balckSize:15X20cm,20X30,30X40,35X45Allow precise placement of filter media.Prevent media from entering your filter system.Great for bio-balls, activated carbon, ceramic and ammonia remover.Zipper closure for reusable purpose.Versatile media bags are designed for filtration applications, these media bags hold carbon, ammonia remover resins, or any other type of filter media. Keep media in these media bags and prevent fines from washing out. These bags provide a convenient way to customize aquarium filtration. Allow precise placement of filter media Prevent media from entering your filter system Great for bio-balls, activated carbon, ceramic and ammonia remover Package includes: 10pcs Filter Media Bag Note: 1.Please allow 0.1-0.5 inch differences due to manual measurement, thanks. 2.Please understand because of the light irradiation or computer display difference, the item`s color might be slightly different from the pictures. _x000D_ _x000D_ _x000D_