Adopted zinc alloy and stainless steel, this indicator door lock is sturdy and durable for long use. Red and green color will indicate whether the room is occupied, applicable to public toilet, restroom and bathroom.   Features: Made from zinc alloy and stainless steel, this bolt lock is sturdy and durable for long use. Can be used for public toilet, restroom and bathroom to indicate that the room is vacant or engaged. Red(engaged) and green(vacant) color is easy to recognize for universal indication. Easy to install, suitable for partition door and bulkhead door. Applicable to public toilets such as airport, station, hospital, shopping mall and office building. Specification: Condition: Material: Zinc Alloy + 304 Stainless Steel Main Color: Silver Indication Color: Red, Green Universal Suitable Plate Thickness: about 12~18mm/0.47~0.71in Detailed Size: Shown as Picture Weight: Approx.183g/6.5oz   Package List: 1 * Indicator Door Bolt Lock with Screws   Note: 1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.