WDMA 144 x 80 12ft Sliding Glass Patio Door for saleLVDUN 144 x 80 12ft Sliding Glass Patio Door for sale Product Description 1. Imported German SIEGENIA lifting push pull hardware is adopted, the handle upward is to open, and the handle downward is to close. In the process of pushing and pulling, if you need to lock, let the handle upward to achieve any angle positioning. You can also use G U brand hardware. 2. It can be with a one sided handle and a clasp on the other side or a double sided handle