where can i buy boron

{"cid":"91195071","title":"High Precision Strongest Magnets Neodymium Iron Boron Material","imgUrl":"https:\/\/img.chinax.com\/nimg\/83\/54\/daaf11f5f76e750410bf47c6044f-200x200-1.jpg","attrs":{"Price":"$0.01~$496.00","Brand Name":"STAR","Model Number":"S6-N52","Minimum Order Quantity":"1","Delivery Time":"5~35 days as per customer's project and quantity","Certification":"ISO9001, RoHS, MSDS, Patent certificate, Quality Certificate","Place of Origin":"China","Payment Terms":"T\/T, Western Union, MoneyGram, Paypal, L\/C, WECHAT","Supply Ability":"1000 tons per month","Packaging Details":"Non-magnetism packing with Iron and foam protection, Export carton and pallet","Feature":"High Precision","Material":"Neodymium Iron Boron Material","Surface finish":"Ni-Cu-Ni, Epoxy, Silver, Gold, rubber coated, Phosphatsing, Parylene, Custom","OEM \/ ODM":"OEM and ODM magnet assembly solutions more than 10 years","Technology":"Our R&D engineers support you any time","Quality assurance":"Demagnetization curve report, samples testing"}}

{"cid":"91190311","title":"N52 Strong Neodymium Rare Earth Permanent Magnet For Wind Generators \/ Motor","imgUrl":"https:\/\/img.chinax.com\/nimg\/13\/54\/e9f8903b07719a0d9cc87b8bd8e1-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"VISION","Model Number":"N35-N52","Minimum Order Quantity":"1 piece","Delivery Time":"5 - 15 work days","Place of Origin":"People's republic of China","Certification":"ISO9001:2008; Rohs, Reach, SGS","Supply Ability":"600000 Pieces per Month","Packaging Details":"1 piece","Payment Terms":"negotiable","Type":"Permanent","Composite":"Neodymium Magnet","Shape":"Arc shaped","Application":"Motor Magnet","Coating":"NiCuNi or customized","Material":"Sintered Neodymium-Iron-Boron","Size":"Customers' Request","Magnetism direction":"Axial or customized","Tolerance":"+\/-0.05mm or +\/-0.1mm","Processing":"sintered","Port":"Shenzhen or customer' request"}}