Acme whistles acme thunderer 60.5 Whistle grey the classic coaching whistle trusted by pools, pitches and professionals alike. The acme thunderer brass whistle is a nickel plated brass, non-stick pea whistle with a tapered mouthpiece to produce a high pitch tone. It delivers an easy blow rate with a very high volume output at 3600hz, making it impossible to miss poolside. Preferred by coaches, teachers and officials who need a reliable, authoritative signal every time. One blow. Everyone stops. Nickel plated brass non-stick pea 3600hz tone very high volume easy blow rate 3 key features powerful pitch the tapered mouthpiece is engineered to produce a high-pitch tone at 3600hz. That frequency cuts cleanly through poolside noise, splashing and background chatter. Coaches can command attention from one end of the pool to the other with minimal effort. Easy blow rate the thunderer is rated easy to blow, meaning you can use it repeatedly throughout a long session without fatigue. The non-stick pea mechanism ensures a consistent, clean sound every time the whistle is used. There is no fumbling or unpredictable tone, just a reliable signal when you need it. Durable construction built from nickel plated brass, the thunderer is designed to withstand the humid, chlorinated environment of a swimming pool. At just 20g it is light enough to wear around the neck all session without discomfort. Its compact dimensions of 4.5 X 2.0 X 1.6Cm mean it sits neatly in a kit bag or on a lanyard. ...