The Penn PlaXSmall Aquarium Gravel Vacuum is a super aquarium cleaner, scraper, and siphon. The Gravel-Vac is designed for removal of grungy waste, dirt layers, and debris while leaving the gravel bed at the bottom of your tank. The easy to use self-starting siphon feature makes the Gravel Cleaner the perfect choice for routine maintenance changes. The Unique scraper feature allows you to get below the gravel line, while the nozzle with scraper allows for proper glass cleaning. 16″” cylinder and 72″” hose.