Pipe Threaded Plug Gauge Dimension Type Inch Handle Design Double End Included Handle Taperlock 7 Thread Size 4 In.-8 Thread Type NPT Tolerance Class X Gauge Finish Uncoated Gauge Material Tool Steel Handle Color Blue Handle Length 4 in Handle Material Aluminum Hardness RC 60-62 Included Certification Certificate of Accuracy with NIST Traceability Standards ASME B1.20.1 Thread Direction Right Hand