Pipe Threaded Plug Gauge, Dimension Type Inch, Handle Design Single End, Included Handle Taperlock 3, Thread Class Not Applicable, Thread Size 3/8 In. -18, Thread Type NPT, Gauge Finish Uncoated, Gauge Material Tool Steel, Handle Color Green, Handle Length 3 1/4 in, Included Certification Certificate of Conformance, Long Form Calibration Certificate No, Standards ANSI B 1.20. 1; AGD; NIST, Thread Direction Right Hand