Original Calvin Klein K4U236 / K604000039 Rubber Brown 3mm watch strapThis watch strap from Calvin Klein fits on the watch model K4U236 / K604000039. Please click on Alternatives to view all alternative straps. The lug width of this watch strap is 3mm, the widest part of the strap has a width of 6mm. This watch strap doesn\'t have a straight but specific shaped/curved end. This means that we cannot guarantee that this strap will also fit on other watch models. We advise to contact us in case of doubts. Please read the Product features for more information about this strap.