Oyster is a classic and timeless link design that fits really nicely on the arm. The link is of high quality with solid screwed link pieces. The end pieces are folded. Available widths: 19mm / 20mm Passform for: Seiko Alpinist / Sarb Seiko SKX013 Seiko 7N43-6120 Rolex Datejust Tudor BB36 Seiko 6139-6012 fore. Length: about 170 mm when the link is closed. It can be shortened by 4 link bits. About 6mm shorter per removed link piece. The lock has micro adjustment that allows you to shorten the link a little more and above all find a more precise fit. Material: Stainless steel Color: Two tone / Gold & silver The width of the buckle: 19mm has 17mm wide buckle 20mm has 17mm wide buckle 22mm has 19mm wide buckle Same width of the last link piece before the curved end piece as the strap. Ex is 20mm link last link piece 20mm wide. If you want to shorten the link, you need a 1mm flat screwdriver.