Slide-Back door closer SDC-280 Standard Length: 28inch 1st stage, retracted 54inch 2nd stage, extended 78inch 3rd stage, full extended Standard cylinder diameter: 1 inch Material: Aluminum tube, rustproof Cycle Test: Over 100,000cycles Two type brackets for Slide-Back Door Closer. Type-A - fixed method. Type-B - flexible method. The auto-close door closer, for sliding doors. It can close the sliding door automatically after you in/out house. Keep the flies, bugs, mosquitoes out of houses. The custom length and force are available.
