High Strength C Purlin Roll Forming Machine Automatic C Purlins Roll Forming Machine can produce different size of the C purlin, when it produce different size of C purlin, it need need change the blade and rollers, just need adjust the rollers and cutting device. In this way to meet customer's different requirements. The whole line of Multy Size Galvanized Steel C Channel Purlin Roll Forming Machine mian inculd five part, they are decoiler, main roll forming machine , PLC