Keep your aquarium free from dirt and debris with the Marineland Rite Size A Penguin Power Aquarium Filter Cartridges. This set of four filters is perfect for all water types and is designed for internal use. The filters are made by Marineland, a trusted brand in the pet supplies industry, and are model PA0135-06. These filters are a great addition to any aquarium setup and will help keep your fish healthy and happy. They are easy to install and maintain, and will provide you with clean and clear water for years to come. Don't miss out on this opportunity to create a pristine aquatic environment for your beloved fish.