est Carbide Air Plug Gauge Manufacturer in Sonipat Swaroop Autotechnologies Pvt. Ltd. is manufact... Best Carbide Air Plug Gauge Manufacturer in Sonipat Swaroop Autotechnologies Pvt. Ltd. is manufacturing Air Gauges and its accessories since 2004, we provide Air Plug Gauges (APG) in both Steel(OHNS) and Carbide. Air Plug Gauges in carbide offers various benefits as opposed to the one made in OHNS with improved life due to greater wear resistance and higher hardness, the benefits include: - Longer life of the gauges being used - Lesser inventory turnover levels as the inventory of gauges to be maintained reduce due to lower replacement cycle - Higher Trust in quality of Gauges - Lower total cost spend on Gauges