Heavy plated brass whistle with cork ball and lanyard ring. Equal in size and quality to Acme Thunderer, 1/2-inch x 1-7/8-inch. Super loud clear tone. Non-stick cork ball that can work in any weather condition. Whistle comes with lanyard that is made to last using strong weave technology ensuring the best quality lanyard on the market. Heavy duty braided nylon cord also has a large plated swivel metal J-hook already attached, ready to clip onto any key chain, whistle, or stopwatch.