... 4.sizes:15cm,16cm,17cm,18cm,19cm Materialsilicone strap/material , PASS ROHS/Nickel/Polymer material.original battery,quality warranty time: one yearStandard size15cm,16cm ... , embossed, filled color are available.Certificate Certificate: ROSH , Nickel , Polymer material, 1-3ATM waterproofArtwork formatJPG,PDF,AI,EPS,GIF etc.MOQlarge ...