Door Stopper for Garage Doors UN model MP ST DU BIA — 300 mm, large, white

The UN Door Stopper model MP ST DU BIA is a 300 mm long mechanical stop designed for garage doors and adjacent walls. Finished in white and offered in a large size, this door stopper limits door travel to prevent damage to door edges, frames and surrounding structures. It provides a simple, durable solution for controlling door movement in residential and light commercial garage settings.

Advantages

This door stopper is made for straightforward installation and long-term use, combining a clear physical stop with a neutral white finish that blends with most door and wall surfaces. Its 300 mm length offers extended contact area to absorb impact and reduce wear on door materials. The large form factor improves visibility and mechanical effectiveness compared with smaller stops.

Suitable for

• Residential garage doors requiring a mechanical limit to travel
• Light commercial garage applications such as small workshops or storage units
• Installation on adjacent walls or door frames to protect surfaces from impact

Key specifications

• Length: 300 mm
• Size: large
• Finish: white
• Type: mechanical door stopper for garage doors

How to use

Position the stopper at the required location on the door edge or on the adjacent wall where the door should be restrained. Mark mounting points, drill appropriate holes and secure the stopper using suitable fasteners for the mounting surface. Check alignment by opening the door slowly to ensure the stopper engages at the intended travel limit and adjust position if necessary. Periodically inspect the stopper and fasteners for wear or loosening and tighten or replace as needed to maintain reliable operation.

Usage recommendations

Use corrosion-resistant fasteners appropriate to the wall or frame material and avoid excessive force when the door contacts the stopper. For doors with high closing speeds or heavy mass, consider supplementary damping or a secondary stop to reduce impact loads.