There are various CNG pressure gauge, 12V,5V,10V CNG pressure gaugeSENJE Group.Chengdu Laida Mechanisam and Electronics company, is ... Sichuan Province,China. Now it is one of largest CNG installation companies in China, which consists of Sichuan Senrui ... company is a professional manufacturer specializes in R&D,manufacturing CNG installation conversion kits for vehicles. We mainly manufacture and ...