Sarcomere is between:
The light I band is divided by the dark Z line, and the dark A band has the lighter H band in its center. A transverse M line is seen in the middle of the H and, and this line plus the narrow light areas on either side of it are sometimes called the pseudo-H zone. The area between two adjacent Z lines is called a sarcomere.
Two adjacent M lines
Two adjacent Z lines
Two adjacent H lines
Two adjacent I bands