Pipe Threaded Plug Gauge, Dimension Type Inch, Handle Design Double End, Included Handle Taperlock 3, Thread Size 1/4 in-18, Thread Type NPT, Tolerance Class X, Gauge Finish Uncoated, Gauge Material Tool Steel, Handle Color Blue, Handle Length 3 in, Hardness RC 60-62, Included Certification Certificate of Accuracy With NIST Traceability, Standards ASME B 1.20. 1, Thread Direction Right Hand