Chrome accessories are made of first quality stainless steel and are guaranteed against rust. All our products are sent to our customers with their invoices. Our products are carefully packaged and sent to you by the cargo company we have an agreement with on the same day or within 1 business day at the latest. If your package is damaged, please hold the cargo officer and do not accept the product. You can request information by message for your questions and contact us. Your messages will be returned as soon as possible. ASSEMBLY INSTRUCTIONS: Please assemble in a dry and clean environment. Make sure the air temperature is 15-35 degrees during assembly. Please try the parts on the vehicle before assembly and make sure they fit properly. Make sure the surface to be assembled is completely clean and dry, otherwise you may experience stripping of the tapes. After being sure, you can perform the assembly by removing the protective surface of the double-sided tape on the product. Please press on it with a soft cloth or your fingertips during the assembly process and make sure it fits in place. · After installation, the vehicle should not be washed for 24 hours.