Stainless steel whistle mouthpiece featuring a unique 2 piece design, tri-chamber and pin. Complicated machining and threaded end with O-ring for tight fit. This mouthpiece is universal for current and future BilletSPIN whistle bodies.

NOTE: Both a mouthpiece and body are needed to complete a whistle.

NOTE: Whistles are loud, but can be blown softly. BilletSPIN is not responsible for any hearing loss you may incur. Not recommended for children.