Come and see our amazing products. These emergency whistles are made of aluminum alloy and metal keychain, durable and non-toxic, not easy to break, fade or corrode, can serve you for a long time. With a key ring, which can be attached to a lanyard or a key. Bring one while doing some outdoor sports like hiking, camping and climbing. It could be used to call for help if there is an accident. 100% guarantee for quality. The price includes shipping cost to ca. QTY for 30,000pcs and over by ocean. Pls confirm with us about the packing info, stock color and exact production time before placing your order.