LTWHOME Compatible Carbon Foam Filters Non But Suitable for Fluval U2 Filter (Pack of 50)Approx size: 130mm x 60mm x 8mm These carbon filter pads are intended as an alternative to the poly carbon cartridge, and offer excellent chemical carbon filtration in the aquarium. There is no poly side to these filters. They are just Activated Carbon impregnated foam. After market product,Not Hagen FLUVAL genuine FOAM Provides efficient water flow with less clogging for long lasting filtration

106 Filtration Systems

1pc carbon foam filter and 1pc coarse blue cube

Approx size: 75mm x 55mm x 55 mm

Foam size:125mm x 125mm x 25 mm

Custom designed and manufactured for Fluval U1 aquarium filters

Approx size: 21 x 21 x 2cm

This filter pad is custom designed and manufactured for Eheim Classic 2213 / 250

Approx size:19 x 19 x 0

6 x Foam pads

Pack include 50 PCS Of Foam Filter

They are just Activated Carbon impregnated foam

Good for freshwater and saltwater environments