Wuxi Breit Precision measuring tools co., Ltd is a technical manufacturing enterprise dedicated to the production of API thread gauges, general thread gauges, and special thread gauges.The company imports the most advanced British MATRIX internal thread and external thread CNC thread grinding machine,and the German Zeiss (ZEISS) Coordinate Measuring Machine.equipped with world-class professional testing equipment Hexagon high-precision GLOBAL S09.15.08 and Hexagon GAGER 06.08.06 CMM,the company'senior technical experts with 30 years of deep professional experience in thread gauge design and manufacturing.The company now produces API SPEC5B,API SPEC7-2,API SPEC11B Master&Working&Taper thread gauges. ACME,STUB ACME,BUTT,NPT,UN,Tr,M series gauges.