Penguin Power Filters Replacement Filter Cartridges - Rite-Size A, B, C

Sizing Information.
The Rite-Size A Marineland Penguin Replacement Filter Cartridge is for the Penguin Mini Power Filter.

The Rite-Size B Marineland Penguin Replacement Filter Cartridge is for the BIO-Wheel 125 Power Filter.

The Rite-Size C Marineland Penguin Replacement Filter Cartridge is for the BIO-Wheel 170 and 330 Power Filter