Rubber flat-mouth suction nozzle Product Description Product Introduction The FS exhaust extraction nozzle connects a vehicle tailpipe to the extraction line: the body is made of premium rubber for wear and pressure resistance, and the bell mouth seats closely over the exhaust pipe to reduce fume leakage during extraction. An inserted metal tube couples directly to the vehicle exhaust pipe and is locked quickly in place with the multi-function bracket and tightening knob,