Features:
- Biochemical filter cotton， good ventilation flow resistance small effective filter impurities
- Drainability strong not easy to jam filter performance is good
- Can be repeated washing ，is not easy to deformation
- Strong pressure resistance and free cutting
- Small soft filter cotton mill hole clearance degree is high Suitable for cultivation of nitrifying bacteria
- Effective change water for your pet to provide a comfortable and balance of the aquatic environment
- 4 sizes are optional

Specifications:
-Material: Acrylic
-Color: White
-Size: 4 sizes fit to our filters for BKL-NZ04， BKL-NZ05， BKL-NZ06， BKL-NZ07， or you can buy for yours according to below Dimension(L&W&H):
BKL-NZ04: 6 X 5 X 3.5 cm
BKL-NZ05: 7 X 6 X 4 cm
BKL-NZ06: 8 X 7 X 4 cm
BKL-NZ07: 8 X 7 X 5 cm

Package Includes:
2 X Filter sponge

Note:Please complete our filters to select your desired filter cotton
When cleaning be careful not to be too vigorously against denitrifying bacteria culture