[Optimized compatibility]: Maximize your aquarium filtration with Large Aquarium Filter Cartridges. Specifically designed for Tetra Whisper Bio-Bag Power Filters including for 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. The unique 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 Tetra 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.<br><br>Please note:There is a slight color difference or difference in kind, it does not affect the use, please do not mind, thank you! Colour:Blue Material:non-woven fabric<br><br>Package Contents: 6 * Filters<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.