You can cut from any size as needed. The cotton hand is soft, can be reused, durable. Solid filtration capacity. Clean can be reused. In very dense cotton, with good water absorption and a rise in permeability, filtration and dirt decomposes. Suitable for seawater, fresh water and aquarium. The product has a high permeability, imitating factory fibers, smaller water resistance, solid water, helps filtration. The product is used for native, untested materials, and there will be no prejudice to fish shrimp turtles. Last name: Aquarium Filtering cotton Classification: Aquarium accessories Material: Cotton filtration Applicable object: Water Scope: Air conditioning, washing machine, faucet, water purifier, sink Use: If it contains a water filtration support : No Color: White Specifications: 0.1 mm * 1m (380g) Number of