Detail [Usage] It can used to assemble any kind of 19 FT networks, communication products and it can connect several units together. [Material] Full frame is formed from quality C.R.S 1.0mm-2.0mm thick. [Surface Management] International popular Grey color, and phosphate treatment for rust prevention, powder coated painting. [Construction] It is full assembly and knockdown construction, and seamless bayonet mounting. [Arts and Crafts] Main parts are stamped at single time, with good adaptability. Products of same model may be installed in a random.