DESCRIPTION:OUTSIDE MICROMETERMT1076A: 0-25mmx0.01mm(0-1"x0.001")MT1085B: 25-50mmx0.01mm(1"-2"x0.001")MT1085C: 50-75mmx0.01mm(2"-3"x0.001")MT1085D: 75-100mmx0.01mm(3"-4"x0.001)