Buckle size : 18mm (Strap Buckle size) Buckle type : Diver Clasp Thickness : Approx. 8.0mm Material : Stainless Steel (Top Quality 316L) Color / Finish : PVD Black Net Weight : 17g Remark : Design to fit 18mm Buckle End Metal, Mesh and Silicon Watch Strap in thickness approx. 3.5mm (max. 4.0mm)