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Cheap price glass door opener automatic sliding door operator for office on China WDMA color:Light Grey very reasonable structure and veryCheap price glass door opener automatic sliding door operator Product Description Product Name Automatic door operator Type: sliding doors, garage doors, entry doors, revolving doors, security doors Material: steel, glass, plastic, stainless steel, aluminum alloy, Open style: Automatic, Sliding, Floding Position: Commercial, Industrial, exterior, interior, garage, garden categories: . construction& real estates Automatic door operators, door closers,