Ideal for officials in sports, teaching, animal training, police authorities, military units, and music specialists. Perfect for sports, gym classes, teaching, coaching, and dog recall. The No. 60.5 whistle is loud, easy to blow, and highly reliable. Features a weatherproof speed pea, producing the classic multi-tone 114 dBA trill characteristic of Acme whistles. Weight 0.044 lbs / 0.020kg Length 1.732inches / 4.40cm Width 0.787inches / 2.00cm Height 0.669inches / 1.70cm Pea whistle Made from solid brass available in a variety of polishes, platings and matt black powdercoat. See the ACME No. 660 for thef BPA-Free plastic version in a variety of colors. Genuine ACME whistle designed, made. and rigorously tested in the UK by specialists with over 150 years of experience. The ACME 60.5 Thunderer is the all-around classic whistle. Small, loud, and easy to use, it has become the iconic image of what most people envision when they think of a "whistle." An all-time favorite with officials and coaches, it is used worldwide by top-level officials in sports, teachers, animal trainers, police authrities, military units, and musical specialists. The tapered mouthpiece allows for a high pitch, and its construction makes it easy to blow. Ideal for sports, gym classes, teaching, coaching, dog recall, and dog walking.