plastic material is carefully and can be used with confidence 1.5mm base is suitable for small door gaps and high indoor and outdoor flat scenes and anti-kick intimate design Effectively prevent children and the elderly from Reduce noise and increase friction Name: Invisible ultra-narrow door stopper Installation: Punch-free Features: Strong magnetic anti-collision Suitable for door gaps: 6-30mm Scope of application: various walls/floors/tiles, etc. Product installation: 1. Tear off the sticker 2. Align and place in the right position 3. Cover the auxiliary installation cover 4. Tear off the sticker on the back of the door stopper and vent in 5. Leave it for 48 hours and push it to lock 6. The auxiliary cover should be removed Colour:As Shown Material:plastic Package Contents: 1 x Magnetic door stopper 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.