Corn Picker Gear Parts for Corn picker Gear box Matrial grade :20CrMnTi .Heat treament Surface hardness 58-63HRC .Core Hardness 30-48HRC With our high quality and low cost products we nearly supply a full line of products and services to our customers from all over world by our group member manufactures. Today, QIS continues to expand its offering of the products and services from Steel fabricating, Plastic injection, Rubber molding and Eletrical parts. We dedicate ourselves to advancing supply chain management. Lowering your transaction costs. Whether value, quality, custom engineered or specialty products. Be assured that QIS can and will be your total source for the products from China.