Bar magnet 1)Composite:N2Fe14B 2)Grade:N35 3)Certificate:ISO9001 & SGS &ROHS 4)Application:Industril magnet; Bar Magnets are composed of neodymium, iron, boron ... discs.Grade:N35-N52,N35M-N48H,N35SH-N45SH,N33UH-N40UHBar magnet Outsanding product:1)high performance:N52,N48M,48SH,42UH,38EH ... ) low weight lossPCT:130c ,humidity 100%,vapor pressure 2.7 bar.20 days,average low weight loss less than 2 mg ...