Anself Aquarium Tank Glass Stainless Steel Algae Scraper Cleaner with Replaceable Blade This product is made of stainless steel, which is resistant to corrosion and anti-rust. Right angle blade design helps cleaning the corner of aquarium tank. Ideal for cleaning all types of algae in fish tank. Normal product length is 38cm, also have a extension rod to meet your needs. Very convenient to install, change blades and use.