Product Name : Copper Washer Inner Diameter : 12mm/0.47" Outer Diameter : 17mm/0.67" Thickness : 1.5mm/0.06" Material : Copper Package Content : 10 x Copper Washer Color : Weight : 12g Max. Operation temperature: 35 Celsius Max. Operation pressure: 16MPa Melting point: 1083C Copper Provides a Tighter Seal and Greater Heat Endurance than Steel and Rubber Washers. Widely applied in the flange and the connection of the chemical plant, electricity generating station, nuclear power station, and electronic, digital consumer products, hardware, precision instruments, electrical appliances, bearings, air pumps, water pumps, water valves, air cylinder, sealing the high pressure systems . Note:Light and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm. Product Notes: Please allow a little manual errors.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 confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.