Mato & Hash High Quality Nickel-Plated Copper Referee Whistle with Black Lanyard Nickel-Plated Copper - Extra Durable Construction Measures 5.3cm x 2.2 cm x 1.5 cm Longer, thicker lanyard than most whistles - 18" Cork pea and copper construction amplifies sound more than standard stainless steel whistles Great for all sorts of applications Referee/Safety/Training - Goes great with Mato & Hash Ref Shirts!