Features:
Fits SUNSUN Canister filters HW-304B/404B/704B/PERFECT/GRECH/Super HW-302 /505A, Polar Aurora 265gph without UV canister filter.
4x sponge bio filter pads (1xCoarse, 2xMedium, 1xFine): trap most visible debris particles without restricting water flow. (Reusable after rinsed)
12 pcs of white floss pads: Filter out fine particles providing crystal clear water.
Provides both mechanical and biofiltration

Dimension:
Sponge: 7.9”x7.7”x0.79”
Floss: 7.9”x7.7”x0.6”

Includes:
1xcoarse (Blue)
2x medium (Green)
1xfine (Black)
12xfloss filter pads (White)

Tips for Usage and Maintenance:

Maintenance of Sponges:
The sponge will need to be rinsed every time it becomes dirty, about once every 1 to 4 weeks.
After 6 to 12 months of usage, the micro holes of the sponge are gradually clogged by tiny debris. So it is also recommended to replace the sponge once 6 to 12 months or when the sponge gets worn out.