12 Packs Large Filter Cartridge For Tetra Whisper Bio-Bag Power Filters 20I,40I/IQ20,30,45,60/PF20,30,40,60 [Compatible with for Tetra Whisper filter] The length of clear out cartridge five in L x 6 in W. It is event ideally suited for giant tetra whisper bio-bag exterior filter PF20, PF30, PF40, PF60, for whisper exterior filter IQ20, IQ30, IQ45, IQ60, for whisper 20i & 40i internal filter. Good principle for Tetra Fauna ReptoFilter 50 gallons (125 GPH). [Superior Filtration Performance] Made of dense double-sided stepped forward cotton and tremendous activated carbon, it affords triple water filtration that gets rid of 99% of clear out debris and fish waste, conserving the water clean and wholesome and advertising healthful fish growth. [Replace Filter Cartridge Regularly] To make certain optimum cleanliness, we recommend changing the aquarium filter cartridges every 2 to 4 weeks in your fish tank includes 12 pack aquarium filter out cottons. Colour:As Shown Material:Composite Materials Package Contents: 12 * Large Filter Cartridge Only the above package content, diversified item are not included. Note: Light mirrored image and diverse reveals may cause the colour of the thing within the picture just a little assorted from the real thing. The length allowed error is +/- 1-3cm.