Supply of high channel

Supply of high channel
Channel is a groove-shaped cross-section of strip steel. Its specifications to waist high (h) * leg width (b) * waist thick (d) the number of millimeters that if the 120 * 53 * 5, said waist height
120 mm, leg width 53 mm, 5 mm thick waist channel, or 12 # channel. High waist the same channel, where several different width and waist thick legs also need to add the right type abc be distinguished, such as 25a # 25b # 25c #, etc.