This Sterling Silver Men's Black Onyx Celtic Knot Dog Tag Pendant is perfect for the man who is strong and independent. Crafted from sterling silver with an onyx stone, this 41mm pendant is part of the Spirit of the Celts Sky Collection and features a Celtic Knot for added security and protection. The 22-inch chain it comes with is both stylish and secure with a lobster catch and includes a complimentary luxury gift box. It carries the hallmarked assurance from the Irish Assay Office, weighing 12.7 grams and measuring 20mm in width.