Pipe Threaded Plug Gauge, Dimension Type Inch, Gauge Type Go/No-Go (Plus/Minus), Handle Design Double End, Included Handle Taperlock 2, Thread Size 1/8 In.-27, Thread Type NPSF, Tolerance Class X, Gauge Finish Uncoated, Gauge Material Tool Steel, Handle Color Blue, Handle Length 3 in, Handle Material Aluminum, Hardness RC 60-62, Included Certification Certificate of Accuracy with NIST Traceability, Pitch Diameter - Go Member 0.3692 in, Pitch Diameter - No-Go Member 0.3727 in