Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3.Perfect for any average do-it-yourself, FREE technical support, easy to install 4.Enhance the Bass & Make Your Speaker Sounds Great --- Exquisite craft, wear-resistant, help to get nice audio effect for low pitch sound and also help protect the speaker from dust and make it cleaner 5.This Speaker surround foam edge is made of high quality rubber, pliable, anti-aging and durable, same surround that professional reconers use. Specifications: Material:rubber Color:Black Size:195x137mm/7.68x5.39inch(ODxID) Outer diameter: 195mm Inner diameter: 137mm Ring outer diameter: 178mm Inner diameter of the ring: 148mm Remarks: Manual measurement, will have +/-3mm error Weight:38g Package include: 2 x Bass horn speaker foams About Shipping: 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.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.