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Features: 1) 1-, 2-, 3-track read heads used in POS (point of sales), magnetic card readers / writers, credit/debit cards 2) 2M-1RXXXX-1 (1-track read heads): a) Outline dimensions: 4.5mm x 4.5mm (L x W) b) Head height: 4.5mm 3) 2M-2RXXXX-1 (2-track read heads): a) Outline dimensions: 7.8mm x 4.5mm (L x W) b) Head height: 4.5mm 4) 2M-3RXXXX-1 (3-track read heads): a) Outline dimensions: 11.8mm x 4.5mm (L x W) b) Head height: 4.5mm5) Main parameters include inductance, DC resistance, gap width and more, adjustable as follows: a) Inductance from 16mH to 110mH b) DC resistance from 20ohm to 350ohm6) Normal lifetime (500,000 times) and long-lifetime (more than 1,000,000 times) technology support (sendust).7) Core: permalloy, sendust8) Products ID include "s" is sendust.9) We supply several mounting brackets for read head.