4pcs Korean bronze electric guitar/bass potentiometer volume tone metal knob cap SDH137 1.Before signing for the package, please confirm that the outer package and the goods are not damaged. If you find the goods damaged, please reject the package, and then the package will be returned to us free of charge. When we receive the returned goods, we will give you a refund. 2.If you are not satisfied with the goods, please contact us within 3 days after receiving the package (subject to the date of receipt),we will help you. As you know, the delivery freight is charged by express delivery, so we don't refund the delivery freight.