Corrosion Resistant: Polyester; Zipper Material: Plastic. Package contains: 10 white filter bags. Filter bag size: 15cm*20cm/5.9"*7.8" Mesh hole diameter: Suitable for respiratory biological rings, activated carbon, volcanic rocks, coral sands, ceramic rings, etc. Not applicable for finer particles. Filter bags are good for various filters, including fresh water tanks, tank filters, power filters, etc.
