ACME Thunderer 58.5 Whistle with Finger-grip

Made By ACME. Traditional and popular pea-whistle with a flexible finger-grip. It has a non-stick pea that can work in any weather condition , even if it is completely immersed in water. Unbeatable in strong winds, easily heard fluctuating frequencies that work at very low breath pressures. It has a solid sound that many rugby referees prefer.