The McCallum Drone Valves provide for controlled airflow to the drones and aid the player with striking in and cutting off the drones.
The valves are made of plastic with a non-return rubber valve. It sits firmly in the blowpipe-stock with aid of a rubber o-ring.The airflow is easily
adjusted by positioning the rubber band to the preferred setting.
To remove valve. The easiest way to remove the valve is to insert a blunt object (e.g. Edding 300 marker) into the stock and use a hammer to knock the
object against the valve.
Set of 3 valves