Perfect DesignThe top surface of the door stop rubber is a wavy groove design with anti-slip strips, which provides more friction and grip than a smooth surface. The bottom surface is a non-slip soft rubber that acts as a good shock absorber, ensuring that your floors and doors will not be damaged by contact with the door stopper, and also protects walls from door impacts. Easy to UseThe movable door stopper installs by simply placing the door wedge on one end of the door, then adjusting the height and angle for balance. The door wedge with a stainless steel handle gives weight to the door stopper and prevents it from warping. If you want to change position, simply pull the door wedge under the door and hang it when not in use, which does not take up to Suitable for Most FloorsThe stops Black rubber non-slip door mats have strong strength and firm grip on wet or dry tiles, concrete, carpet, laminate, linoleum and wooden floors, no need to worry about instability or uncertainty, will not leave marks on the ground. No noise, does not scratch doors, floors and walls. No fear of deformation, strong and wear-resistant, non-slip and anti-vibration. Suitable for Most SeamsDoor stoppers in packs of 4, Sizes: 120 x 50 x 35 mm. Suitable for door and floor gaps from 5mm to 30mm. If the space is too large, use two blocks stacked on top of each other. Before ordering, please measure the under door gap to ensure our rubber door wedges fit properly. Door wedges can be used on most doors, whether wooden, metal or self-closing.