Description Designed For Glass and Acrylic Tanks Up to 1/2″ (12mm) Thick Flipper Edge (Standard) Features:   – New Dual Blade Design For More Efficient Cleaning! – Interchangeable Stainless Steel and Plastic Blades for Stubborn Algae Removal and Safer Scraping Near Silicone. – New 316 Stainless Steel Blade Has a More Precise Edge Design for Flawless Scraping. – Reversible Blades Give you Twice the Normal Blade Life! – New Acrylic Safe Plastic Blades with the Option to Use a Flat or Serrated Edge. – Includes (2) Stainless Steel & (2) Acrylic Safe Plastic Blades. – Custom Cut Your Own Blades Using Old Gift / Credit Cards. – FLOATS to the Surface if the Cleaner Ever Becomes Disconnected. – Ergonomic GRIP/FLIP Handle for Easy FL!PPING from Scrubber to Scraper. – Made with Rare Earth Magnets for Incredible Cleaning Strength and Durability. – Cleans Even the Most Stubborn Coralline Algae.