Pack include: 12pcs foam filter (approx size:285 x 72 x 22mm)and 12pcs polishing pads(thickness: 25mm)
This set fillter pads is custom designed and manufactured for the fluval 404 405 406 filtration systems,and the polishing pads also fit for Fluval 304 305 306
Enhances biological filtration
Provides efficient water flow with less clogging for long lasting filtration
Good for freshwater and saltwater environments