https://www.trustescalator.com/Step-Chain-Roller-with-AL-Hub-OD80mm-W22mm-Bearing-6204-2RS-Use-for-LG-Sigma-Escalator-p.html
Step Chain Roller with AL Hub OD80mm W22mm Bearing 6204 2RS Use for LG-Sigma Escalator
Step Chain Roller with AL Hub OD80mm W22mm Bearing 6204 2RS Use for LG-Sigma Escalator