WUZHOU Whistle, Premium Handcraft Vintage Pure Brass Mini Emergency Survival Whistle Referee Key Chain Whistle for Camping Hiking Sports PREMIUM MATERIAL - All using high quality brass construction, including a copper ring, a new, compact and fashionable design. Exquisite finish, after polishing using advanced stripping process, can effectively protect the whistle body, not easy to scratch and anti-oxidation. CHANGE COLORS - Brass changes as a result of the oxidation color process, a different color will have a different visual aesthetic feel. HOW TO CLEAN - Once oxidation can be used to sand paper polishing or wipe toothpaste, copper color may return to its original state. APPLICATION - Suitable for outdoor survival, defend and save lives, collection of EDC players and so on. Color: Gold Size: 1*4.7cm Quantity: 2pcs Kind tips: 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding. 3. Only the above package contents, excluding other products.