This sports referee whistle is made of premium material, which can withstand long-lasting use. Features the stainless steel material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. This sports referee whistle will make competitioneasier and smoother. Features -Color:As Shown-Material:stainless steel-Size:53.00X1.80X2.10cm/20.83X0.71X0.83in- This whistle has a thick cork notch. You can feel the quality of the material and hear the difference compared to a whistle without a bowl.- The sound can quickly reach 120 decibels, allowing you to quickly attract the attention of others.- The moving referee whistle is sturdy and durable, not easy to rust or corrode.- Not easy to deform or break, suitable for long-term use, and you can also share them with others.- Whether as a referee, gym teacher, or training dogs, our whistles are extremely versatile.Packing list: 2 x whistles