Filter foam compatible with the CPF-250/180 pressurized pond filter foam

Replacement sponges compatible with Polar Aurora CPF-250, CPF-180 pressure filters and for 10,000 L ponds. Yellow sponge: 20 cm (L) x 20 cm (W) x 2.7 cm (H) Blue sponge: 25.4 cm (L) x 25.4 cm (W) x 3.6 cm (H) Contents: 3 yellow sponges, 3 blue sponges. Note: Due to vacuum packaging, the sponges may appear thinner. This does not affect filter efficiency. Simply soak them in water for 5 to 10 minutes to restore them to their original size.