Material: [Stainless steel] Color:[Silver] Size:[4*2cm] The package includes: [Whistle]&[6 Pcs] Product Description: Excellent craftsmanship: The whistle has been polished, the surface is smooth and mark-free, it is comfortable to use, will not scratch your mouth, and is very safe. Package size: You will receive 6 stainless steel whistles. The whistle size is about 4*2cm and the cord length is about 42cm, which is enough for your daily use. Whistle Sport: Very suitable for referees, coaches, training, teachers, maintaining order, traffic command, situation control, emergency rescue and disaster relief, survival and assistance, etc.