Fluval Razor+ is a 2in1 algae magnet cleaner with a non-abrasive scrubber pad and a strong blade. Go from scraper to scrubber in one simple snap with the Razor+ 2-in-1 Algae Magnet. Th rounded scrubber surface makes the Fluval Razor+ suitable for flat or curved aquariums.Fluval Razor+ S+ 2-in-1 design allows user to change from scraping to scrubbing mode in one simple flip+ non-abrasive scrubber is effective on algae, yet gentle on aquarium glass+ 316 Stainless Steel replaceable blade scrapes without scratching for hard to remove algae+ long and thing design easily slips between and behind coral and rocks+ rounded scrubber surface suitable for flat or curved aquariums+ anti-friction pads smoothly glide the scraper over the glass+ for use in freshwater and saltwater aquariums+ dimensions: 3.5x16x3.2 cm+ suitable up to 10 mm glass thickness