1. professional manufacturer for door roller. 2. good quality and competitive price. 3. pretty appearance and safety. TOMA Automatic door roller General specificationsSlat size option: 55mm,60mm,77mm,100mmSlat material: aluminium or galvanized steelRail option: 65mm,80mm,100mmDriving option: Motorised or remote control or manual controlMain colour: White(Other color could be made upon customer's ...