[Optimized compatibility]: Maximize your aquarium filtration with Large Aquarium Filter Cartridges. Specifically designed for Whisper Bio-Bag Power Filters including Whisper, IQ20-130GPH, IQ30-175GPH, IQ45-215GPH, IQ60-300GPH, 20i-125GPH, 40i-170GPH, PF20-105GPH, PF30-145GPH, PF40-210GPH, PF60-330GPH series, covering a wide range of models to provide perfect fit and superior performance. [Pre-assembled for convenience]: Time-saving and hassle-free, our large fish tank filter cartridges come pre-assembled. Just unpack and it's ready to use, making aquarium maintenance quick and easy. [Premium quality materials]: Ensuring maximum durability and reliability, our replacement filter cartridges are crafted with hemmed edges preventing carbon dust leakage. 3-grid ABS frame maintains an even distribution of activated carbon, providing safe and thorough water flow filtration. The ABS plastic edges are specifically shaped for ReptoFilter Filter Cartridges, preserving shape and resisting deformation. [Triple filtration upgrade]: Boasting a dense dual-sided mesh, aquarium filter enhances debris capture and fish waste filtration. The Ultra-Activated carbon in our filters swiftly eliminates odors, discoloration, and maintains pH balance, topped with a promise of crystal clear aquarium water. Please note: There may be slight color differences due to lighting or display settings, but this does not affect product quality or functionality. Color: Blue Material: Non-woven fabric Package Contents: 6 x Filters Only the above package content is included; other products are not included. Note: Due to lighting and monitor differences, the item's color in the photo may slightly vary from the actual item. A measurement error of +/- 1-3cm is acceptable.