1. This welding gauge measures internal alignment of pipe after fit-up/alignment.2. Made of high quality stainless steel, this gauge is durable and not easily scratched.3. Gauge is clearly marked by which is wear-resisting and ensures a clear reading.4. Measurements read in standard on one side and on the opposite side.5. The gauge measures internal mismatch of pipe wall, scribe lines, weld fillet and crown height.Item Type: Welding GaugeMaterial: Stainless steelModel: Large high and low gaugeType: Accurate gaugeScope of Application: It is suitable for the inspection of boilers, bridges, shipbuilding, pressure vessels and oilfield pipelines. It is also suitable for measuring parts with high welding quality requirements.Package List:1 x Large Height Inspection Ruler1 x User Manual1 x Packing BoxThe compact and practical design makes its work more stable.