Clestra Modular System Pvt. Ltd. Manufactures Steel Synchrone Office Partitions. Clestra Modular System Pvt. Ltd. Is ISO 9001: 14001 and OHSAS 18001 certified company. The Steel Synchrone Office Partitions is a metal or glazed partition which is monobloc, movable and modular. The sizes of the standard panels are 600, 675 or 750 mm that makes them easier to install. As the junction fixing system is embedded into the panel, a pencil line vertical joint is achieved.