McCallum Drone Valves are designed to assist pipers in achieving consistent and steady strike-ins and cut-offs. They are simply fitted into the bottom of each drone stock inside the bag.
McCallum drone valves are suitable for most bag setups with access to the inside of the bag. If the valves are too loose, then you should wrap the threaded area with waxed hemp to ensure a tighter fit.
To adjust the air intake, then you should pull gently on the elastic and move the rubber valve until the desired resistance has been attained.
This item is non returnable
11 in stock