Product Name: Copper Washer Total Size: 12 x 18 x 1.5mm/0.5" x 0.7" x 0.06"(Inner Dia * OD * T) Material: Copper Color: Copper Tone Net Weight: 33g Essential for Automotive and Small Engine Repairs. Washers made from copper are often used within piping, electronics, household products, and bio applications as copper is malleable and ductile - a biostatic surface that is a good conductor of heat and, when very pure, a good conductor of electricity. Copper Provides a Tighter Seal and Greater Heat Endurance than Steel and Rubber Washers. These obviously have industrial uses, but we also sell them to weavers, artisans who make wall hangings, a lady who uses them to accent macrame hanging baskets etc. Package Contents: 20 x Copper Washers Only the above package content, other products are not included. Note: Light shooting 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 +/- 1-3cm. 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.