Material: 304 stainless steel Size: 4.7cm/1.8in1.5cm/0.59in / 1.83″0.58″ Color: as shown in the picture 1. Made of 304 stainless steel, sturdy and long-lasting: This whistle is made of 304 stainless steel, which can withstand more harsh environmental tests and is not prone to rust or damage. High-quality whistle sound, clear and loud: The whistle adopts a professional design inside, and most importantly, it has excellent sound quality with a clear and loud whistle sound. Compact and lightweight, easy to carry: The whistle is small and lightweight, making it very convenient to carry outdoors, such as camping, hiking, and exploration activities. Multi-purpose application, professional choice: This whistle is widely used in various fields such as police, referee, and players, and is a reliable professional equipment. Safe and reliable guarantee: The whistle is very safe to use, without any harmful substances, and has reliable quality. Package includes: 100 x whistle. There is a time zone difference, but we will do our best to quickly response to your questions. We always send the item to the address you give us on Payoneer to ensure the security of the item. All pictures are for illustration purpose only and Colours may vary slightly. We will cover the cost if sending replacement/repaired items.