The 7-Link bracelet is only compatible with the Strat-o-timer and the Hydrotimer. This bracelet has 7 separate links with a dual finish of brushed and polished. The end link is 20mm in width, tapering to 16mm with adjustable links that include screw pins for an easier sizing experience. The bracelet clasp has a built in tool-less micro adjusting feature that include 9 points of adjustments making this bracelet a comfortable fit for any wrist size. The end links include quick release pins for an easy swap.