Superior 55Are the type of an external door with a thickness of 55 mm filled with expanded polystyrene foam, which is characterized by very good insulating and acoustic properties. The doo leaf cover is made of steel sheet, protected against corrosion, covered with high-quality foil resistant to UV radiation and weather conditions. The entrance structures meet EU energy standards for external doors and perfectly fit the requirements of our climate zone. As standard, they are equipped with two independent locks with three bolts, three anti-theft bolts and three triple hinges. The security standard and thickness of the sheet metal used for the production of the door wing and the frame ensure high resistance to burglary.