The door lock green red indicator is made of copper and stainless steel, which is sturdy and tough, not easy to break or deform, can be used for a long time. The door lock green red indicator is simple to use, simply turn the knob to the inside to lock and unlock, very convenient. Size:5.20X5.20X2.80cm/2.04X2.04X1.10in (rotary knob) Size:7.80X7.70X2.20cm/3.07X3.03X0.86in (lock cylinder) Indicator door lock has the characterized of elegant, clean, wear- at any public places. Open (green)/closed (red) indicator shows whether the room is occupied, convenient and simple.<br><br>With this indicator door lock, allow your customer recognize which room is available conveniently. No more need for an embarrassing knock to see if there is someone in the restroom. A wide range of applications, door lock indicator can be used in airports, railway stations, hospitals, offices, etc. Color: As Shown Material: Stainless Steel + Copper<br><br>Package Contents: 1 * bathroom door lock<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.