iso 8 9 precision double helical gears

{"cid":"91212205","title":"OEM ODM High Precision Double Helical Gears ISO 8-9 Grade for Industrial Applications","imgUrl":"https:\/\/img.ismap.com\/nimg\/3b\/97\/1a15044505c6a9aa4f9b4c77ed46-200x200-1.jpg","attrs":{"Price":"$1000\/ Piece","Brand Name":"YIZGEAR","Model Number":"DB22082401","Minimum Order Quantity":"1 Piece","Delivery Time":"75 Days","Place of Origin":"CHINA","Payment Terms":"L\/C, D\/P, T\/T, Western Union","Supply Ability":"100 Pieces\/Month","Packaging Details":"Plywood Crate","Material":"SAE 4340","Gear Profile Type":"Double Helical Gear","Heat Treatment":"Quenching & Tempering","Hardness":"260-300 HB","Manufacture":"Gear Hobbing","Quality Grade":"ISO 8-9"}}