Qingdao Sangao Metal Structure Co.,Ltd is a professional traffic lamp post manufacturer and factory,Website:http://www.china-weldedpipe.com, ... made in China for years, welcome to contact us.Traffic Lamp Post1) Material: steel SS400/Q2352) Designed for various kinds of ... system option9) Application:City plaza,harbors,highways,overpass,large area,work-yards,industrial area,car parks and sports stadiums