Centec 98680 | 4 Inch Pipe and Conduit Cleaning Nozzle with Locking Collar
A  1.50" X 4" (100mm) curved pipe, conduit, and cable bundle cleaning nozzle with nylon brush and a 1.50" collar designed to fit to commercial extension wands preventing unintended separation when working overhead.
Features and benefits:
The nylon brush strip is centered in the cleaning orifice to permit airflow to both sides of the brush. 
A high impact ABS collar is designed to fit and lock onto to industry standard 1.5" compression collars to ensure against unintended separation when working overhead.