The acme thundered is a traditional and popular pea-whistle with a cushioned 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. The acme thundered has a solid sound that many referees prefer above other brands. -Sku 59048 kh features: - Small, high, loud - waterproof speed pea - easy blow- instant response - lead free - out performs even the closest copies - used in nfl, fifa, olympics and many other world class leagues specifications: - Model: 60.5 - includes 1 whistle as always, satisfaction is guaranteed. If we determine that we shipped an unusable product, we will replace, repair or refund, at our option. If you return a product for another reason, such as just not liking graphics, or sizing, we will refund your purchase price minus the shipping charges.