Feature: 1. No damage to the glass, easy for cleaning, wear resistant and durable algal removing knife. 2. Anti-scratch sticker, when moving the downy brush, hook on the inner brush catch the garbage and algae stuck to the cylinder body. 3. Magnetic brush and scraper can used replaceable, one brush for two uses. 4. Suspension design to prevent the magnetic brush from sinking to the bottom of the cylinder. 5. Non-slip handle design, easy to operate and convenient to use. Specification: Condition: 100% Brand New Item Type: Aquarium Magnetic Brush Optional Mode: ZY-01S, ZY-01M, ZY-01L, ZY-01XL Material: ABS Color: As Picture Shown Mode Suitable Aquarium Glass Thickness ZY-01S 20-30cm/7.87-11.81inch Below 5mm/0.20inch ZY-01M 40-60cm/15.75-23.62inch 5-8mm/0.20-0.31inch ZY-01L 60-100cm/23.62-39.37inch 8-12mm/0.31-0.47inch ZY-01XL Above 100cm/39.37inch 12-15mm/0.47-0.59inch Usage: Due to the strong suction of the product, rotate the two surfaces of the brush to 90 degrees before opening, and then forcibly break them apart to avoid pinching fingers. Package List: 1 x Aquarium Magnetic Brush 2 x Scraper Note: 1. Keep the wearer of a pacemaker away2. Place out of reach of children