7 10mm hardened layer depth track rollers

{"cid":"91190803","title":"Daewoo DH55 High Duty Forged Steel Top Carrier Roller with HRC52-60 Hardness and 7-10mm Hardened Layer ISO9001 Certified","imgUrl":"https:\/\/img.chinax.com\/nimg\/95\/04\/ef918dbf5d90afde3abde55cfc35-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"YT","Model Number":"DH55","Minimum Order Quantity":"1PCS","Delivery Time":"7-30 Days","Place of Origin":"China","Payment Terms":"L\/C,T\/T","Supply Ability":"10000 PCS\/Month","Packaging Details":"Standard Export Packaging","Model NO.":"DH55","Application":"Excavator","Color":"As customer request","Certification":"ISO9001: 2000","Condition":"New","Material":"40Mn2, 40MnB, and 50Mn","Finish":"Smooth","Process":"Forging \/Casting"}}

{"cid":"91190021","title":"4mm Depth HRC56 CAT E200B Undercarriage Roller","imgUrl":"https:\/\/img.chinax.com\/nimg\/ea\/54\/2ecad3d342fdb41de5f5f0331d74-200x200-1.jpg","attrs":{"Price":"","Brand Name":"CAT","Model Number":"E200B","Minimum Order Quantity":"1","Certification":"CE ISO","Place of Origin":"China","Supply Ability":"10000 per year","Packaging Details":"nude","Color":"Yellow Or Black","HS Code":"84314999","Delivery":"15days","Model Available":"Cat E200B E120B E70B 320","Warranty":"2000h","Model":"CAT E200B"}}