Material: Inorganic acid inhibitor, brightening agent, copper corrosion inhibitor Size: 5*5*16cm / 1.95"*1.95"*6.24" Color: as shown in the picture 1. Low foam and high cleanliness: Patina cleaner's low foam formula can greatly reduce the foam during the oxidation regeneration process, making the cleaning effect more thorough. 2. Fast dissolving: With Patina cleaner, you can quickly dissolve the oxidation layer of copper, bronze, tin and copper alloys, avoiding the tedious wiping process. 3. Gentle formula: Patina cleaner adopts a gentle formula that will not cause any damage to your copper or bronze, protecting your collection or household items. 4. No traces left behind: With Patina cleaner, you don't have to worry about leaving any traces or residues on your utensils after use, perfectly protecting the perfect face of your copper or bronze. 5. Economical and practical: Patina cleaner is a highly cost-effective copper cleaner. You can buy a higher quality cleaner at a more favorable price, allowing you to better protect your investment collection. Package includes: 1-5*patina cleaner