Solid materials. Drawer slides are good but not great, probably will slide smoother with more weight on them, soft closing mechanism works. Instructions pretty detailed and are accompanied by pictures so installation is pretty straight forward. Most time consuming part of install is ensuring slides are level, aimed straight towards to cabinet back wall and parallel to each other without jigs. Even when doing this and everything is perfect, I found the rear mounting brackets for rails can interfere with the drawer sliding back so had to make slight adjustment for the drawer to clear when closing. Does state drawer itself does not require glue but will likely end up gluing to provide more rigidity especially because the drawer bottom shifts around. I ordered 17" wide versions and they were 21" deep as described. I needed other widths that the "Lynetta" model didn't offer so ordered a different model only to find that they were 20" deep, not 21" as they were described.