Our History Ningbo Defa aluminum profile accessories Co.,Ltd. is located in the southern outskirts of Ningbo City, near Ningbo airport and seaport, very convenient for transportation. The company is about 12,000 square meters and has already invested total RMB 8,600,000 for its products and equipments in the past 10 years. Our Factory DFH is the mother manufacturer company of three factories: Aluminum Profile Accessories Factory, Pipe Rack System Factory and Metal Tool Factory. Our Product DFH specialized in producing and developing aluminum profile accessories and pipe tack systems.