3 1 2 id rotary kelly

{"cid":"91217788","title":"API 7-1 6 Inch 6-5\/8 REG NC56 Hexagonal Rotary Kelly 3-1\/2 ID For Oil Gas Drilling","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/b5\/d8\/a63eb5979a9b579b07e9fb72df29-200x200-1.jpg","attrs":{"Price":"777","Brand Name":"SWS","Minimum Order Quantity":"1 PCS","Place of Origin":"China","Product Name":"Rotary Kelly","Standard":"API 7-1","Size":"6","Upper and Lower Connection":"Hexagonal","Top Connection Thread":"6-5\/8REG","Bottom Connection Thread":"NC56","Top Connection OD":"7-3\/4","Bottom Connection OD":"7","ID":"3-1\/2","Drive Section":"6-13\/16","Use":"Oil and Gas Drilling"}}