1. Material: spring steel2. Size: All size 3. Suface processing: Black , Zinc plating , Nickel plating4. Package: Carton packing or wooden packing5. Used by many automobile company in China.6. Model Number: GB DIN ANSI/ASME ISO7. Packaging Details: Carton or as per the customer,s requirement8. Delivery Time: 20 to 30 days after your order.