Features: Accuracy is stable, alkali-resistant and acid-resistant use of Jinan green stone, solid and will not produce convex lines, burrs. Electroplating hard chromium, anti-rust and durable,we use environmental protection iron polishing casting and electroplating hard chromium to achieve durable anti-rust characteristics. The use of aluminum clamp base and high stability aluminum material assembly test table can reduce the man-made error and improve the precision. The height of rod can be adjusted freely. The elastic degree of the mounting hole can be adjusted freely. The test position can be adjusted freely. The operation is more convenient. High precision measurement, fast display of dual-chip sensor cemented carbide probe computer control acquisition. Removable type, alloy head adopts 2.5M removable type cemented carbide head, it can replace all kinds of M2.5 probe. The stability measurement of dual-chip sensor has the advantages of stable precision and fast measurement. Add USB MINI-B universal transmission interface can communicate with computer to output data, convenient and fast. Specification: Measuring Range:0~12.7mm Resolution:0.01mm Accuracy:+-0.04mm Battery:1*Button Cell CR2032(Not Included) Base Size:100*150*50mm/3.94*5.91*1.97in Base Accuracy:+-0.002mm Grade:00 Rod Length:250mm/9.84in Arm length:140mm/5.51in Package List: 1*Marble Base 1*Holder 1*Digital Meter 1*Users Manual . Note : Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.