This NBR rubber watch band with a curved end lug perfectly fit Seiko SKX007, SKX009 and SKX011 models, etc. NBR rubber has superior strength and more resistant than natural rubber to oils and acids. Material has met the RoHS requirements and rarely causes severe allergic reaction. Accompany with well-built stainless steel buckle and a featured big keeper. This item also includes one pair of custom made 1.78mm spring bars for easy but secure installation. NBR rubber watch band is a good choice of Seiko replacement watch band for your SKX007, SKX009 and SKX011.