Features: Brand new and high quality Good Quality Materials: This double tube whistle is make from good quality aluminum alloy materials, can being used for long timing. Loud Whistle: This highly frequency is loud, and that transmission distance is long, very useful for various emergency situation. Easy to Use and Carry: This small aluminum alloy whistle is small and lightly weight, can being hangings on the keyring as ornaments. Multiple-purpose: Emergency tool aluminum alloy safety whistle for variety of occasion, such us camping, hikings, hunting. Wide Application: Suitable for adventurers, sports enthusiasts, and trainer, our whistle is a multifunctional tool for signaling and communication. Specifications: Materials: Aluminum Alloy Package Weight: about.30g Color Options: 7 Color is Available as Show in the Picture. Size: about.55x10mm/2.16x0.39in Package Includes: 2Pcs Lifesaving Whistle note: Please allow 1-3mm error due to manual measurement. Please make sures you not mind before your bid. Due to the differences between different monitors, the picture may not reflect the actual colorful of the item. Thanks!