Adopted premium 201 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.Specification:Condition: 100% Brand NewMaterial: 201 Stainless SteelMain Color: SilverIndication Color: Red, GreenUniversal Suitable Plate Thickness: about 12~18mm/0.47~0.71inDetailed Size: Shown as PictureWeight: Approx.200g/7.1oz 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.