20mm Hexad Oyster 316L Stainless Steel Watch Band Straight Lug, Diver Clasp, PVD Black Shipping Estimate : 7 - 10 Business Days within US. Material: 316L Stainless Steel, all solid links include end links Metal Finish: PVD Black Generic Seiko Dia. 2.5mm spring bars included Design to fit: All watches with 20mm lug width