conepulley,drawing cone, steppulley,drawing plate, different specification is available Steppulley, conepulley ,drawing cone, drawing plate Adopt supersonic ... -up spool, Guideway, etc, in this way can enable surface hardness to reach HRc75, which much betterThan that of steel and ... the same time reduce cost, and prolong service life. Different specification is available upon your inquiry. Cone pulley