Material: Wood.Made from thin durable wood, eco-friendly, safe and reusable, intended for chalks.Hole is universal sized and will work with all standard door knobs.When you need some quiet and space,it is good choice . Hang on your bedroom door ", "Please knock" sign or "Seeping" tag, And keep the little trouble makers out.Suitable to use for reminders, such as "Party tomorrow" or "Pickup at 4:00" and leave them on your kitchen cabinet knobs - you will for sure not miss this.These Door Knob Hanger Tags offer a unique way to label kids bedrooms: as boys, girls, baby Room.... toy closets, kitchen cabinets. Use them to write lovely messages to family or friends in a different way!Colour: BlackMaterial: woodPackage Contents:6 * Door SignOnly the above package content, other products are not included.Note: Light 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.