Features: Shape is beautiful and please you. Handle improves Cleaner action. Suitable for 3mm/6mm/10mm/15mm/25mm thick glass Aquariums. The pad removes algae efficiently. Strong magnetic, stable and waterproof. Suitable for fish enthusiasts, pet store, and Aquariums staff, keep your Aquariums clean. Specifications: Material: Magnetic+Plastic Type: 5 Option Size: As Shows Package Includes: 1x Algae Scraper note: 1. Avoid quick collisioning when usings, be careful to use and hurt the glass. 2. Do not put this product near electronic devices, watches, magnetic cards.. with strong magnetic field (away from pacemakers!!!). 3. Limited to Aquariums use, do not let kids touch. 4. Because of the particularity of acrylic fish tanks, recommend to add a filter pad. 5.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before order. 6.Due to the differences between different monitors, the picture may not reflect the actual color.