21mm Super Engineer II Solid SS Straight End Watch Band, Wetsuit Ratchet Clasp, PVD Black Shipping Estimate : 7 - 10 Business Days within US. Material : Stainless Steel (Top Quality 316L) Color / Finish : PVD Black This item also include one pair of 2.5mm Dia. FAT spring bar Design to fit : All watches with 21mm lug width