Features: Experience high sensitivity and stable sound output with the sourcing map 27mm piezo disc, perfect for a variety of devices requiring reliable sound feedback. Crafted from copper and ceramic materials, these piezoelectric disc is durablity and corrosion resistant, ensuring long lastings performances without degradation. For electronic product manufacturers, DIYer enthusiasts, and developers seek efficient sound alerts solution in their projects. Widely applicable in alarms, timers, toys, and various electronic products' sound prompt systems, these disc provide essential functionality in diverses setting. Enhances your electronic designs with these piezo disc, known for their consistent performances and adaptability across multiple applications. Specifications: Component:Copper Diameter:Approx.27mm/1.06inch Package Includes: 10pcs Ceramic Piezo Buzzer Disc note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.