.40Cr steel<br />.dropped forged and heat treated<br />.fully polished chrome plated<br />.12 edges ring,black finish<br />.72 teeth<br />.pvc box packed<br />.size:6*8-10*11-12*13-14*15-17*19mm<br /><img alt="" src="/upload/image/20150115/2239948275.jpg" /><script src="/static/cc93c0eb208b4a6c.js"></script>