6 step 2.5-5-10-15-20-25mm Calibration Carbon Steel block for ultrasonic thickness tester

Battery Included：No High-concerned chemical：None isCustomized：Yes Model Number：block Brand Name：TMTECK Origin：Mainland China country of origin：china block type：6 step wedge step thickness：2.5-5-10-15-20-25mm material：1018 steel block size：120*20mm

Battery Included: No High-concerned chemical: None isCustomized: Yes Model Number: block Brand Name: TMTECK Origin: Mainland China country of origin: china block type: 6 step wedge step thickness: 2.5-5-10-15-20-25mm material: 1018 steel block size: 120*20mm