... garage doors 1.automatic or manual operation 2.With original design of our company 3.Made in China Yantai Shengda Doors ... Technology Co.,LtdWe reseach,development ,and manufacture sectional garage door, industrial door, ... , Door opener(Motor),Windows opener , etc.. Overhead Sectional Garage Door:1.Certificate-- ISO 9001Quality Management System2.Unique Design -- ...