C-channel  is a common type of steel products, which could be used in many areas with different specifications.

It's  typical among section steel usage.

The reason it's called C channel, because it has C shaped cross section and is made of steel.

Automatic roll forming machine could produce it.

During the metal process, its specification could be adjustable for different requirement.

By usage and material, it has galvanized steel type , HDG cable tray type, glass slot type , metal roof purlin type, high precision type for equipment.

For instance of purlin C channel, it has 80, 100, 120, 140, 160 specifications.

Apllication:

It has universal application, like steel purlin as building material for steel frame house, light roof frame, supporing frame, bean and upright for machinery and etc.