1STABLE MATERIAL: Copper grain adopt selected material after standard process, stable in dry air, does not react with water, soluble in nitric acid and hot concentrated sulfuric acid 2EXCELLENT PERFORMANCE: Copper grain has good ductility, thermal conductivity and electrical conductivity 3WIDE APPLICATION: Copper casting grain can be used in industrial filtration, petroleum, chemical, printing and other industries 4TECHNICAL PARAMETERS: Raw copper metal come with 99.99% high purity, 200 grams package, the size is 35mm 5EASY HANDLING: The copper granules are small and easy to handle, making them convenient for various applications 1 Packof CopperGrain Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!