All sales are final and non-refundable. Sorry, we do not do returns, exchanges, or refunds for chimney liners or chimney parts. The chimney liner kits cost several hundred dollars to ship. Therefore, we do not accept returns because shipping costs take hundreds if not thousands of dollars to ship. We also custom make each liner. Call us, we will make every effort to help you prior to ordering to make sure you get all the right products for you.