Item Type: Stainless steel whistle Product Material: Stainless steel Product Specifications: 10 x Stainless steel whistle Weight: Approx. 330g / 11.6oz Length: 4cm / 1.6in Width: 1.5cm / 0.6in Height: 2cm / 0.8in Length Of Rope: 42cm / 16.5in Package List 10 x Stainless Steel Whistle 1Loud Crisp Sound: The sound is penetrating, loud and clear, easy to whistle. The whistle could be heard clearly from a long distance. 2Lightweight: The whistle weighs 330g(11.6oz ). Well designed and easy to transport with removable sling to hang around the neck. 3Stainless Steel: Safe, durable and easy to use, much better than the plastic whistles. The solid stainless steel whistle won't readily rust or corrode. 4Free Your Hands: Each whistle comes with a yellow lanyard. Clean and hygienic, portable design, you can buckle on a key ring or hang around your neck. 5Widely Used: Suitable for outdoor survival, lifeguard, camping, hiking, mountaineering, gym class, basketball, soccer, etc.