Aquarium Mesh Media Filter Bag - EYEFANCEE Nylon Pond Mesh Filter Bag with Plastic Zipper White VERSATILE MEDIA BAGS AS FILTERATION TOOLS: EYEFANCEE aquarium media filter bags are designed to hold bio-balls, activated carbon, ceramic and ammonia remover, preventing fines from being washed out, also preventing media from entering your filter system to make your pond clean. SPECIFICATION: The nylon media filter bag is sized to Approx. 20 x 30 cm / 8" x 12", made of nylon and plastic. NOTES: as the hole of the nylon mesh filter bag is about 1x1mm, so the media bag can't hold below 1x1mm media. Zipper closure for reusable purpose. EXTRA FUNCTION: The aquarium filter media bags are not only used as an application to keep your aquarium or pond tidy and clean, but could be your laundry bags or storage bags which are supposed to get your housework in order. PACKAGE CONTENT: including 5 aquarium media filter bags 100% SATISFACTION GUARANTEE: The aquarium media filter bags are guaranteed to meet your standards - or return it for a replacement or refund.