Starrett, 67132, 25mm, 4-1/16" Plain Thimble, 0.3118" Dia x 1-7/16" Long Spindle, Mechanical Micrometer Head 5-1/2" Long, Accurate Up to 0mm, Rotating Flat Spindle, 1" Dia x 7/8" Long Stem, Carbide Measuring Face