... Step Chain Roller for Sigma Escalator 1.Size:D(80) 2.Step roller, chain roller 3.Suitable for Sigma escalator 4.OEM D(80) Step Chain Roller ... Unit, Sprocket(bottom)Steps: Step Tread, Riser, Step Demarcation Line, Driving Roller/Trailing Roller, Step ChainOur main products: Elevator Hanger ... Schindler, Dongyang, Toshiba, KONE , Thyssee, Hyundai, LG, Otis, Dover, Fujitect, O&K, and Selcom, ect. Our ...