This Service Dog key chain is made from Zinc alloy with the words “Service Dog” and the Blue medical alert symbol embossed in colored enamel. Quality materials and manufacturing ensure this Keychain is durable, robust and sure to last you for years to come. Perfect for anyone with a ESA that wants to clearly identify your dog in public or private places. Attach them to your keys, dogs vest, dog collar or person. Theres no wrong way to carry these light weight and sturdy keychains.