1.more than 40 years professional produce experience. 2.suplly more than 1000 typies of famous tractor factories oversea. Supplying high quality tiller blade assembling with various cultivators and tractors,exporting to Korea, Spain,italy,Japan, Europe, USA,India, Middle East Asian countries,etc..Features: Material: spring steel, 65Mn, 60Si2Mn (Sup7) or 28SiMnB2) Process: forged3) Heat treatment: ...