Threaded Plug Gauge Assembly, Dimension Type Inch, Gauge Type Go/No-Go (Plus/Minus), Handle Design Double End, Included Handle Taperlock 5, Thread Class 2B, Thread Size 1 1/2 In.-6, Thread Type UNC, Tolerance Class X, Gauge Finish Chrome Plated, Gauge Length – Go Member 1 1/4 in, Gauge Length – No-Go Member 3/4 in, Gauge Material Tool Steel, Handle Color Blue, Handle Length 4 in, Hardness RC 70-72, Included Certification Certificate of Accuracy with NIST Traceability