Robust, smooth outer surface prevents the suction hose from snagging. The internal, highly flexible suction hose allows for maximum flexibility. Conical geometry (27 mm to 32 mm) for improved suction performance. The Cleantec connector securely connects the suction hose and power tool with a bayonet lock. The Cleantec connector allows for individual adjustment of the airflow through the continuously adjustable bypass. Equipped with an RFID chip for automatic suction hose recognition. The beginning and end pieces of two suction hoses can be connected together by simply plugging them in, thus extending their length. The Festool suction hose: smooth and flexible - with a smooth outer surface for significantly improved handling, longer lifespan, and higher suction performance. The Cleantec C connector ensures a secure fit on the tool - when the connection comes loose, you decide, not chance.