Qingdao Sangao Metal Structure Co.,Ltd is a professional single arm lighting poles manufacturer and factory,Website:http://www.china-weldedpipe.com, ... Single / Double / Triple Outreach Arm Applications Street / Road Lighting, Highway Lighting, Commercial Areas Lighting, Seaport Lighting, AirPort Lighting, etc. Shape Conical, Round, Polygonal (Octagonal, Dodecagonal ...