Magnetic Filter Bar/Cartridge Company: Ningbo Mingrui Magnetic Materials Co.,Ltd. (NB.MR.) Assembled with several round-type Magnetic Filter Bar/Cartridge that can produce the most powerful magnetic field (up to 12,000 gauss) This Magnetic Filter Bar/Cartridge is used to select iron from other metals in recycling industries Measurements; High quality ;Competitive price 25 x 100 (D x L); 25 x 300 (D x L);25 x 500 (D x L) ;25 x 600 (D x L); 25 x 1000 (D x L); 25 x 1500 (D x L); Tel:+86-574-87496577 Fax:+86-574-87498372