A236 Features: -Bio-Foam. -Enhances biological filtration. -Adds a second layer of mechanical filtration. -For freshwater and marine environments. Filter Placement: -Internal. Parts: -Yes. Pet Category: -Fish and Aquatic Pets. Product Type: -See Description. Color: -Blacks & Grays. Generic Dimensions: -2.6" H x 2.8" W x 7.4" D. Dimensions: Overall Height - Top to Bottom: -2.6 Inches. Overall Width - Side to Side: -2.8 Inches. Overall Depth - Front to Back: -7.4 Inches. Overall Product Weight: -0.1 Pounds.