Material: Zinc alloy. Usage: They can be widely used in airports, stations, hospitals, offices, restaurants, shopping malls, offices and other public restrooms. Easy to install: The latch can be mounted directly on the cabin door or recessed panel, easy to install and convenient to use. Empty (green) \/ Engaged (red). Nice design: no more awkward knocking to see if there is someone in the toilet. This empty (green) \/ engaged (red) indicator directly shows whether the room is occupied. Instructions: 1. Made of high quality zinc alloy, beautiful appearance, corrosion resistant, attractive and durable, not easy to fade or rust. 2. Indicator Lock Size: 61mm 45mm, hole distance: 49mm. 3. Surface mount with bolt fixing and can be mounted directly on the cabin or recessed panel door. 4. Scope of delivery: 1 x turn signal lock (with screws). Note: 1. Manual measurement, there may be some errors, please understand. 2. Item color may vary from the pictures depending on your computer's brightness and display settings.