23mm Super Engineer II Solid Stainless Steel Watch Bracelet in PVD Black Shipping Estimate : 7 - 10 Business Days within US. Material : Solid 316L Stainless Steel, PVD Black Buckle : Push Button Double Flip-Lock Diver Clasp Remark : 2.5mm Dia. Fat type spring bars included Design to fit 23mm : All watches with 23mm lug width