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 lock is sturdy and durable for long use. Can be 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: 100% Material: Zinc Alloy + 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.207g/7.3oz <>Package List: 1 * Indicator Door Lock with Screws <>Note: 1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding. 2. s are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the as standard.