... 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 for Sigma Escalator1. ... , SCHINDLER, SELCOM escalator Supply Elevator & Escalator Spare PartsEscalator Parts: Cladding, Chain Guard, Handrail, Decking, Speed Sensor, HR Roller, Newell Wheels, ...