Features: The streamlined designs are beautiful and pleasing to the eye. Anti-skid handle improves cleaning action. Suitable for less than 4mm thick or 120cm length glass aquarium. The anti-scratch cleaning pad removes algae efficiently. Strong magnetic force, stable and waterproof. No damage to the glass. Suitable for fish enthusiasts, pet store owners, and aquarium staff, this brush is a must have tool for keeping your aquarium in good condition. Specifications: Material: Magnet+Plastic Size: Approx.106x38x68mm/4.17x1.50x2.68'' Color: Black or White Package Includes: 1x Algae Scraper note: 1. Avoid quick collision when using, be careful to use and hurt the glass. 2. Do not put this product near electronic devices, watches, magnetic cards, medical equipment, etc. with strong magnetic field (Keep away from pacemakers!!!). 3. Limited to aquarium use, do not let children touch. 4. Do not recommend the use of acrylic/plastic aquarium, avoid the sand and other hard particles between the aquarium and the glass. 5.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 6.Due to the differences between different monitors, the picture may not reflect the actual color of the item.