• Box of 2 high quality, reusable aquarium filter bags
• Suitable as a holder for other mechanical or chemical aquarium filter media
• 225 micron thin-mesh aquarium filter bags are now used in Red Sea's Reefer and Max-S Systems
• 225 micron thin-mesh aquarium filter bags are perfect for whenever there is a lot of particulate matter in the water
• These 10.5-inch long aquarium filter bags for Red Sea's Reefer and Max-S aquariums will also fit any standard 4-inch filter bag holder