Feature: 1. Total of 320pcs locking washers, including 7 sizes: M3, M4, M5, M6, M8, M10, M12, which can meet different needs. 2. Exerts a spring force between the fasteners head and the substrate to create more friction and resistance to rotation. 3. Suitable for machinery equipment, industrial production of shock absorption and insulation. 4. Made of premium quality manganese steel, rustproof, corrosion‑resistant and durable. 5. Manufactured to meet standard specification, strictly follow factory quality control. Specification: Item Type: Push-On Locking Washer Material: Manganese Steel Surface Treatment: Black Oxide Application: Used for car shock absorption and insulation Specification: M8 50pcs M12 30pcs M6 50pcs M10 40pcs M4 50pcs M3 50pcs M5 50pcs Package List: 320 x Locking Washers All the items will be dispatched within one business day by Airmail after the payment is clear. Most times you will receive your order within 10-30 business days after we transfer your package to the delivery company. We cannot guarantee the delivery timeframe if the post office has any unexpected delays due to holiday,weather,customs, or other conditions. Some countries like Russia, Brazil, or some European countries may take up to 50 days or longer for delivery. We appreciate your patience if you haven't received items in 30 days(Russian customers may need more patience by reason of the local delivery system and/or customs). If you are concerned in any way, please feel free to contact us via ebay message instead of leaving negative/neutral feedback or opening a dispute. We will do our best to solve any problem(resend or refund any missingitem). Customs duty is obligation and liability of citizens in yourresponsible for any tax and custom duty incurred. Generally, thedelay or failure delivery is sometimes caused by the policy of different customs. Our listing price includes the value of goods,packaging cost,and export taxes,not including international duties. duties,taxes,and charges are not included in the item price or shipping fee. The duties are buyers' responsibility.Please check with your country's customs office determine what these additional costs will be prior to your purchase. All disputes arising from the duties will be submitted to ebay for solution. Any questions, pls. contact us via ebay message or email us. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. kindly leave us a positive feedback and give us the Detailed Seller Rating with all "5" in very area. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better.We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.