Come and see our amazing products. Aluminum alloy material, strong and durable. With unique double tubes design, our emergency whistle is super loud. A loud safety whistle for any type of outdoor activities such as camping, hiking, hunting, fishing, boating, and can also be used for dog training. 2.16" L x 2.03" W Pls confirm with us about the packing info, stock color and exact production time before placing your order