Specification Brand : Dntum BulletPoint1 : HIGH-QUALITY MATERIALS- The product is made of ABS material, with a concave-convex non-slip design on the side, and a large high-definition LED display is clearer. BulletPoint2 : HIGH PRECISION- The machine has high performance, the measuring range of steel is 1.2~225mm, the measuring error is + -(0.5%H+0.2)mm, and the working frequency is 5MHz. BulletPoint3 : The resolution of the machine is 0.1mm, the working temperature is 0~40℃, the lower limit of pipe measurement is 20*3mm, and the low battery is automatically prompted. BulletPoint4 : There are 10 built-in pre-stored sound speeds: steel, aluminum, copper, brass, zinc, acrylic, glass, polyvinyl, lead, and tin. BulletPoint5 : 100% SATISFACTION GUARANTEE- Our company's products from the design, manufacturing, inspection strict level by level to achieve one-step in place, to ensure customer satisfaction. Reach out to our amazing product support team if you have any questions or concerns. ExternallyAssignedProductIdentifier : 7019455767010 ItemName : Ultrasonic Thickness Gauge, Digital Sound Velocity Meter Metal Depth Tester, Range 1.2-225mm with Auto Calibration, for Steel Cast Steel Aluminum Plastic Glass Fiber Glass ItemTypeKeyword : thickness-gauges Manufacturer : Dntum MetalType : other PartNumber : GYXSM48525 ProductDescription : Specifications: Name: High-precision ultrasonic thickness gauge Material: ABS Colour: Black Measuring range: 1.2~225mm (steel) Measurement error: + -(0.5%H+0.2)mm /H is the thickness Resolution: 0.1mm Working frequency: 5MHz Working temperature: 0~40°C Lower limit of pipe measurement: 20 3mm Pre-stored sound speed: built-in 10 sound speeds Product size: 13.8 7 3cm Packing size: 26 21 5.8cm Net weight: 0.8KG Gross weight: 1.5KG Package includes Ultrasonic thickness gauge 1 Measuring line 1 Manual 1 Suitcase 1