Featuring a flat and serrated edge, make your aquarium cleaner exactly what you need, with acrylic-safe, non-scratch plastic blades. These blades are replacement blades for the Flipper Edge 2 in 1 aquarium cleaner. Insert at any direction, or cut into custom shape for maximum flexibility. Suitable for glass or plastic. Includes 10 blades. Compatible with the Flipper Platinum Aquarium Cleaners including, 10â, 12â Nano, 18â or 28â aquarium cleaning tools.