Description

(1)The slats :made of bi- or single layer aluminum alloy shapes of superior quality and precision,there are silencing seals between the connections of the slats. (2)Adde polyester foam,made of color steel sheet,heat preservation and heat insulation,diversified in colors. (3)there are built-in balancing torsion springs in the roller shaft. (4)Two types of motors, namely, built-in or outlay; the door can be electrically,manually or remotely operated. (5)Metal parts including: aluminum alloy, steel guide slot, with silencing seal inside,angle bracket model of the guide slot, down (or up) limit switch, door handle, shaft bracket, automatic alignment balancing system for slats and so on.