The Mansfield number 40 trip lever has the shorter arm about 7 inches long. Over the years the lever has changed. They no longer put the name on the front, They added holes in the arm so it could work with other models, changed the color of the nut and threaded piece behind the handle. The Mansfield number 40 lever fits tanks 11, 21, 26, 125, 159, 160, 165, 170, 171, 175, 180, 181, and 190.
This product is available.