100/150 Micron Aquarium Filter Sump Felt Sock Mesh Bag With Mesh FiltrationOOTDTY Features: Filter socks are the best form of mechanical filtration. It is an essential part for wet/dry filtration systems, containers and diy filters. Removes excess food, spatter, organic waste, and other particulate matter to lower ammonia and other unwanted substances. Used as mechanical filtration for any sump and diy filters. Specification: Type: Aquarium Filter Bag Material: Polypropylene Micron Rating: 100UM/150UM Measurement: 105mm × 230mm/4.13" x 9.06" (Approx.) Color: White Quantity: 1 PcNote: 1. Please allow 1-3cm error due to manual measurement. Pls make sure you do not mind before bidding.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included: 1 x Fish Tank Filter Bag (No Retail)