1pc Steel Internal Single Purpose Welding Gauge Root Gap Misalignment Inspection Gage 0-4MM Features: This welding gauge measures internal alignment of pipe after fit-up/alignment. Made of steel, this gauge is durable and not easily scratched. Gauge surface is clearly marked by laser which is wear-resisting and ensures a clear reading. Small size and light weight, it is convenient to carry and easy e. Widely used for welding inspection of boiler, shipbuilding, bridge, pressure vessel and oil pipeline. Specifications: Material: Steel Measuring Range: 0-4mm Item Size: 15.3*2cm/6*0.8in Quantity: 1 Weight: 55g(approx.) Package Includes: 1 x Gauge