Aquarium Magnet Cleaner Designed with Two Magnetic Pieces, Inner side is Coarse for Scrubbing and the other side is smooth for polishing the glass. The coarse side is to be inserted inside the tank and the smooth side is attached via the Magnet to the outside of the glass and with gentle motion remove the algae from the tank. ? Size is 2'' x 2'' ? Ideal For Keeping Algae Off Glass ? Inner side Coarse For Scrubbing /Outer side For Polishing Terms and Conditions. We use Paypal for taking payment, if you wish to purchase via other methods please email us for customer service. Sales Tax will be added to all shipments to New Jersey. We always try to combine purchases, please contact us directly for a personal service. You will be notified on the day that your goods have been dispatched via e-mail with tracking which is used on all purchases. Please note that if there are any problems, contact us first via e-mail giving full details of any problem along with your user ID. We use USPS and UPS as our chosen carriers shipments to Hawaii, Alaska Puerto Rico may incur surcharges, contact will be made to advise before shipment at which point the order can be cancelled if desired. Orders placed on Saturday/Sunday Public Holidays will be processed next working day. We pride ourselves on excellent feedback, if any part of the buying experience is not to your satisfaction, please contact us to rectify before leaving feedback. By committing to buy you are agreeing to the Terms Conditions stated above.