A magnetic recording and reading device having a magnetic head assembly in which a magnetic head is mounted on a suspension, an RW-IC having a line width of not more than 0. The improved longitudinal support structure for longitudinally supporting the leg brace provides a pivot post attached to the outer lower portion of the leg brace. The conductive lines are capable of being operably connected with bonds of an ejector. Accordingly, the MEMS device has a lateral vent hole.