Be confident in your purchase we're an Authorized Coral RX Dealer. How cool is that?!?!? Features: (5) Blades Total For use in the both the Original Flipper MAX and Flipper MAX Float Magnetic Aquarium Cleaners on Acrylic Tanks from 5/8 up to 1 (15 - 25mm) thickness Complete cleaning without ever getting your hands wet! Plastic blades: Made for acrylic tanks Replace your blades! FL!PPER MAX ABS replacement blades restore your Flipper MAX Magnetic Aquarium Fish Tank Cleaner back to its original cleaning powers! For use on acrylic tanks from 5/8" up to 1" (15 - 25mm) thickness. These ABS replacement scraper blades are designed with an ultra-low profile making it easy to clean the hard-to-reach areas of your tank! Blades are interchangeable and replaceable. Each package contains (5) Flipper MAX ABS plastic scraper blades designed for acrylic tanks. ABS Replacement blades are compatible with both the Original Flipper MAX and Flipper MAX Float Aquarium Cleaners. For Optimal Cleaning performance, Replace blades every 1-3 months.