S.T. International Stainless Steel Gravel Sand Substrate Scraper, 12.6-Inch Made of true Stainless Steel material Much more durable and chemical-resistant than any other imitating brand and lasts 5 times longer Dual sided scraper with a large scraper and small scraper on each end Suitable for saltwater/freshwater tanks, aqua garden tanks and reptile tanks and its rounded design will not hurt animals or plants