seeing is believing 1)What you want are what we pursuit 2)Material:carbon,alloy or stainless steel 3)high quality assurance ProductHelical gearCertificateISO9001 :2000MaterialCarbon,alloy or stainless steel as you requestTechnicsFree forgingMachining servicesforging, heat treatment, precision machiningTime cost of machining 1day/pcStandard/NonstandardNonstandardTechnis standardGB,JIS,ANSI,etc. ...