Be confident in your purchase we're an Authorized Coral RX Dealer. How cool is that?!?!? Features: Pico Cleaner Replacement Blades - 4 Pack For Glass Acrylic tanks Up to 1/4" (6MM) Thick Use Caution Near Sand Line.. Trapped Sand Can Scratch Aquarium Glass Official FL!PPER Pico 2-in-1 Magnetic Scrubber / Scraper Replacement Blades! The Flipper Pico (sold separately) is a fun-sized aquarium cleaner designed for quick daily soft algae removal! Its small, dual-sided, magnetic aquarium cleaner has an abrasive scrubbing pad on one side, and with just a twist of the outside handle, the scrubbing pad FL!PS inside the tank to an algae-busting scraper. Complete and efficient hands-dry aquarium cleaning! Great for small tanks! Easily Flips around square corners. Keep your glass or acrylic aquarium fish tank looking as good as the day you bought it! Strong rare earth magnets make it easy to clean your tank without getting your hands wet! Scrub and scrape all day with Flipper's patented fun flipping action!