super strong flat magnets for compasses

{"cid":"91220550","title":"Large Square Thin Flat Super Strong Neodymium Magnetic Sheet N52 40x20x10mm for Generator","imgUrl":"https:\/\/img.chinax.com\/nimg\/d8\/46\/14ec0fab7d285fc38410df06b4b2-200x200-1.jpg","attrs":{"Price":"$2.99 - $4.99\/pieces","Brand Name":"U-POLEMAG","Model Number":"N35","Minimum Order Quantity":"100 pieces","Delivery Time":"22-30 days","Place of Origin":"Fujian, China","Type":"Permanent","Composite":"Neodymium Magnet","Shape":"Block","Application":"Industrial Magnet","Tolerance":"\u00b13%","Processing Service":"Welding, Cutting","Grade":"Ndfeb, N35-N52 (M.H.SH.UH.EH.AH)","Product Name":"Neodymium Magnetic 40x20x10mm for Generator","Coating":"Nickel","Precise Tolerance":"+\/-0.05mm","Main Materials":"Ni-Cu-Ni. Zinc. Epoxy","Size":"Customized","Quality System":"ISO9001:2000","brand":"U-POLEMAG","Composite:":"Rare Earth Magnet","Sample Lead Time":"15-20 Days","Packaging Details":"Customized Super Strong Sintered N52 Neodymium Magnet Standard Carton or Customized","Port":"XIAMEN,SHANGHAI"}}