First they accidentally sent me 20 inch drawer slides. The outer box said 16 inches, but the manufacturer's box clearly stated they were 20 inches. I also measure them to be sure. No problem, Revain sent me a replacement quickly. I got the correct 16" drawer slides. Unfortunately the correct 16" slides were unusable. Half of the slides were unfolded, so the slide wheel was not seated properly. See photos. I had to complete the project, so I found another solution and just sent this product back. . Buyer Warning.