Pipe Threaded Plug Gauge Dimension Type Inch Gauge Type L1/L3 Handle Design Double End Included Handle Taperlock 3 Thread Size 3/8 In.-18 Thread Type NPTF Tolerance Class X Gauge Finish Uncoated Gauge Material Tool Steel Handle Color Blue Handle Length 3 1/4 in Handle Material Aluminum Hardness RC 60-62 Included Certification Certificate of Accuracy with NIST Traceability Standards ASME B1.20.5 Thread Direction Right Hand