Easy to handle systems for all types of workshops. Unique design of rail and trolley gives very high extraction efficiency. Extraction units are available with balancer for keeping the hose raised, and damper for automatic airflow control. Using click on brackets for rail means easy installation. Extraction units are easy to move, thanks to lightweight material and ball bearing wheels. One extraction unit can serve several workbays. Two 400 units serve cars with twin exhaust pipes. Manual disconnection of exhaust nozzles.