16pcs Large Filter Cartridges for Whisper Bio Bag Filters for Whisper 20i 40i…
【 100% compatible with Whisper Filter】 :Our filters are perfectly compatible with Whisper 20i, 40i, IQ20/30/45/60, PF20/30/40/60 and Repto Filter in sizes 7.1 "X 5.1" for 20-60 gallon aquariums. ABS plastic edges are more durable and resistant to deformation, making them a perfect fit for Whisper filters.