【BIRTHDAY GIFTS】Celebrate milestones with this American Flag dog tag necklace, designed for ages 10, 13, 16, 18, 21, 30, 40, 50 and 60! Whether for a teen's first double-digit birthday or a 60th anniversary of life, this engraved keepsake symbolizes pride and personal achievement. Suitable for children over 3 years old. 【UNIQUE DESIGN】 Combining patriotic design and birthday anniversaries, the shape of an American flag badge and a military dog tag makes it a patriotic statement for everyday wear or special occasions. The 24 inches necklace fits everyone's universal style. The unisex design can be easily paired with casual or formal wear. The number necklaces are ideal for stylish accessories. 【HIGH QUALITY MATERIALS】The mens necklace is made of high quality 316L stainless steel, which is strictly polished and will not hurt your skin, non-toxic, harmless, non-irritating and non-allergic to the human body. The necklace for men is highly corrosion resistant, waterproof and sturdy and does not easily lose color, it can be worn and kept for a long time. 【IDEAL GIFT】This number necklace is a great gifts for men, women, boys, kids, nephew, son, grandson, husband, father, brother, athletes, friends and yourself. The necklace can be used as a sincere gift for Birthday, Easter, Christmas, Valentine's Day, Thanksgiving, Father's Day or other important days. Suitable for children over 3 years old. 【AFTER-SALES GUARANTEE】We have high standard production process and strict product inspection process. We also have high standard after-sale guarantee, if you have any questions about the product, please feel free to contact our customer service, we will provide you with a proper solution within 24 hours.