Kiefer 691001 Deluxe Whistle, Solid Brass Lifeguard whistle, inspired by the popular Acme Thunderer whistle Whistle is solid brass with silver nickel plating and has a tapered mouthpiece Perfect for lifeguards, swimming pools and waterfronts Contains a non-degradable cork pea to give it a piercing trill that cannot be ignored Makes an ideal safety whistle