• Box of 2 high quality, reusable Aquarium Filter bags
• Suitable as a holder for other mechanical or chemical Aquarium Filter Media
• Micron Aquarium felt filter bags are very effective at trapping particulate matter in the thick wall of the bag
• Designed to provide fine ‘polishing’ of fish tank water that is already low in particulate matter (mature aquariums)
• 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