● Since it is made of real titanium, it has been engraved properly. The back of the clasp is engraved with the "TITANIUM", which is a proof of authenticity.Engraving is not an obligation, but we use pure titanium, which can be proudly proud of. Super thick and voluminous look; Necklace is approx. 0.5 inches (12 mm) wide and 0.2 inches (5 mm) thick.It has a fairly wide image. If you compare it side by side with a 0.2 inch (5 mm) wide curb necklace, you can see the difference at a glance. It looks more voluminous than the width of the necklace. Comes with a case. Comes in a nice custom case. Care Instructions: If sweat or other stains get stuck and dirty, please wash it with water and wipe it thoroughly. (Product Specifications) Material: (Body/Clasp) Pure titanium; Size/Weight: Approx. 23.6 inches (60 cm), 2.8 inches (80 g), 2.6 inches (65 cm), 3.6 inches (86 g), 2.7 inches (70 cm), 3.2 inches (93 g); Width: Approx. 0.0 inches (12 mm) / 5 mm); Accessories: Dedicated case; Accessories: A special case.