1.certification:ISO 9001:2008 2.Structure:conveyor system; 3.type:air-cooled motorized roller. Electric Roller Features:1.Plastic color roller has good performance of transmission.2.ISO9001 quality system3.print date or number on Aluminum foil, PP,PET,PVC etc4.Size and color are available.5.Prompt delivery6.No swelling.no cracking, no falling chips, and no degumming Excellent resistance against ...