Be confident in your purchase we're an Authorized Flipper Dealer. How cool is that?!?!? Patent pending design allows you to use any old credit card, gift card, hotel room key etc as a scraper blade....you may never have to buy blades again! Blade cards can be inserted in any direction for multiple levels of flexibility Cut your own custom blade card shapes for cleaning difficult curved or tight areas of your tank. Solid fiberglass matrix handle is practically indestructible! Optional stainless steel blade (sold separately) is great for tackling really hard algae deposits all over your tank (for glass tanks only). Replacement acrylic blades are available as well.