The size of this strap is 185 mm in length and 20*18 mm in width. The thickness is 3.5 mm. Comes with a 2.5 mm spring bar. Only suitable for the following models of the Turtle Six series: r35 SPB183 / SPB151 / SPB153 / SPB301 / SPB257 / SPB237. Other styles are not suitable, please note that imitation cases and tables cannot be assembled. Only suitable for original and genuine Seiko products. If it is not certain whether it can be installed, please contact the owner to confirm. Returns must be properly packaged. For example, returns of a strap due to inadequate protection against scratches, dirt or other problems will not be accepted. Please check carefully before placing an order. Beware of problems, do not order. The end link and buckle are solid, and the strap link is a screw structure that unscrews with a 1 mm screwdriver. Real photo cell phone strap, watch and case shown in the picture, exclusive sale of the strap. Please do not buy if you have high requirements. Thank you.