elxxroonm 24 Pack Rite-Size C Filter Cartridges Compatible with Marineland Penguin PRO Power Filters 275/375 & Original Penguin Power Filters 200/350 - Rite-Size C Replacement Filter Cartridges is up for auction in Pet Supplies. The current bid is $1.00, 97% below the $36.89 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.