API gages,API plug and ring gage

Along with the reforming of the Chinese economic system,more and more products "made in China" are recognized by the world around for its quality-price rate. No matter home electronic products,aviation or petroleum exploitation.

In this background was our company,Shanghai's Jingoo petroleum apparatus Co., Ltd was founded .As we have noticed, although Chinese oil tube,bushing are acknowledged by many client overseas,they still do not know we are also expert at oil gauge making.And our company is the only export company specialized in API SPEC 5B , SPEC 7 series thread gauge exporting.

Our confidence lies in the high quality and precision of our gauges which assured by the regional standard guage in China and independent third-party certification recognized by API.