Material: Alligator Leather Color: Black Lug width: 20mm, Buckle size: 18mm, Overall Length: 130mm + 55mm Lug width: 21mm, Buckle size: 18mm, Overall Length: 140mm + 55mm Thickness: 2-4mm Buckle Include: Yes Buckle type: Stainless Steel Depolyant Clasp (Can also fit 18mm original depolyant clasp) Design to fit: IWC and all watches with 20mm or 21mm lug width