Dear all: We mainly specialized in producing and assembling all kinds of gas valves and regulators or related spare parts?R&D, All our products are used in Barbecue and heaters for exportation or export to overseas directly. The items we had produced and R&D are more than 20 kinds, they also had been certified by CSA, AGA,CE & ISO9000 system . your inquiry will be highly appreicated and you may send to export at gda dot com dot cn. Best regards Cathie