HI-LO Stainless Steel Welding Gauge Inch&Metric for Measurement of Pipe After Fit-up/Alignment Fit-Up Gap 32mm 37 1/2" Can be calibrated to NBS standard Polished, bright and clean without burr, rust laser engraved line and will not rub off Made of stainless steel, is not easy to bend, accuracy of reading Measures internal alignment of pipe after fit-up/ alignment, bevel on end preparation,the crown heig Measurements read in standard on one side, and metric on the opposite side