A287 Size: S20 (Up to 20 gallons) Features: -Power filter. -Self priming. -Power filter for aquariums up to 10 gallons, 15 gallons and 20 gallons. -Unique design is compact and slim. Filter Placement: -Internal. Filter Type: -Power. Pet Category: -Fish and Aquatic Pets. Product Type: -See Description. Generic Dimensions: -S10 6.5'' H x 7.3'' W x 3.7'' D. -S15 6.4'' H x 9.1'' W x 3.7'' D. -S20 6.4'' H x 11.5'' W x 3.8'' D.