For Glass Tanks Only: Mini size: 1.17" L x 1.17" W x 1.1" H. Perfect size for fish tanks up to 10 gallons. Work great to clean glass with thickness less than 1/5 inches. Not Fit for Acrylic or Plastic Tanks! Strong Magnetism: The fish tank glass cleaner carries strong magnetic force which makes the 2 magnet pads stick tightly to the glass without falling off. Make sure the magnet is clean before scrubbing. Double-sided Cleaning: The coarse pad can effectively scrub hard stains or mineral deposits inside the glass. And the soft pad is used to wipe dust outside. Thoroughly clean the tank to keep it crystal clear. Easy to Use: Just move the soft pad outside, and the coarse pad will follow it to clean the inside. With square structure, the aquarium magnetic brush can clean small corners or hard-to-reach places with ease. Sturdy Construction: This mini fish tank scrubber is made of heavy-duty and light plastic with excellent durability. It is comfortable in hand and dependable for long-time use. Product description