Notice! 1. Our products are not of quality issues and do not support returns; please be aware of them before purchasing! 2. The prices of our products are all ex-factory prices for small quantities, and bulk purchases are required!Please contact customer service for a new quote! 3. Our product samples do not support invoicing. Please consult customer service before placing an order. Invoicing for large products requires a price including tax and a single amount of 3,000 yuan or more or a cumulative amount of 3,000 yuan or more before invoicing. The bare metal use distance of this product is 18-20mm. If it needs to be 21-25mm, it needs to be used with a functional table sticker.