Metal: Real 10K Yellow Gold Chain Type: Hollow & Solid Finish: Polished Closure: Lobster Clasp (2.0mm Spring Clasp) Width and Weight (Hollow): - 2.0mm: 0.10gram per 1 inch - 2.5mm: 0.14gram per 1 inch - 3.5mm: 0.20gram per 1 inch - 4.5mm: 0.33gram per 1 inch - 5.0mm: 0.47gram per 1 inch - 6.5mm: 0.75gram per 1 inch - 7.5mm: 0.94gram per ...