Push 1, prevention devices prevent forcibly move the door, security. 

2, (optional) in case of Humanized design of rebound barrier to prevent drop of runtime for collision of cars, people or vehicles to go through. Body solid, and can be equipped (optional automatic warning device) and push-away devices prevent forcibly move the door, alarm and security. 

3, in accordance with the different characteristics of the building you can choose Interior, exterior, containing three different installation methods, open the shutter after rolling in the upper part of the door, saving space within the garage, and no dirt, rain, snow and other debris into the garage, aesthetically pleasing fashion.