Note:this product contains three sizesSeparately:A:18-35BFB18-35) B:35-50BFB18-50 ) C50-160BFB18-160,Please write to us what size you need.Description:1.50-160mm Dial Bore Gauge Hole Indicator Measuring Tool Kit2.Designed for measuring diameter, roundness, taper, plane distance3.Mainly used to measure internal dimension of work pieces by comparative method4.Good guiding protective bridge design can be self-centering exactly and reliably5.Easy to use: the moveable anvil on one side and an interchangeable on the other side, which serves for setting the bore diameters6.High resolution & accuracy, durable and reliable to use7.Comes with interchangeable alloy steel anvils8.Comes with a box for easy storage and carrying9.100% brand new and high quality10.Measuring Range: 18~160mm11.Resolution: 0.01mmPackage Contents:1*Dial Bore Gauge Tool Kit (As Pictures Show)