iTouch Replacement Band Fits iTouch Air 3 40mm case, Sport 3/Sport 4 See Descr Designed for iTouch Models Fits iTouch Air 3 (40mm case), Sport 3, and Sport 4. Designed specifically for watches with 20mm lug width. * Not compatible with Air 3 (44mm) or Air 4 models. #iTouch #ITouchband #iTouch20mm