Bulb:1) The inner and outside tube are made by Philips from Netherlands 2)The tube Electrode is made by Newsylvania from USA 3)The purity of mercury is reach to 99.999999%  4)Presently,In china as the leader of equipment and production line which import from Korea 5)Strongly resist ultraviolet in china 6)Best permeability of bulb tube in china 7)Xenon with high purity and best protection is made by Messers from Germany 8)The tube atmospheri pressure beyond 6A to increase Luminous flux,protect the electrode and prolong the bulbs life 8)Luminous flux is adequate to protect the electrode and prolong the bulb's life 9)The input wire is the original that using in brand car of "VW"  10)The ballast which we manufacture is according to the parameter of bulb,then match each other very well 11)The bulb voltage range is between:85V+/-10V,However the international standard is 85V+/-17V 12)If you are interested of this pls trying to measure the bulb dimester?The diameter of tube is 8.9~9.2mm,but other is 8.6~8.8mm,then you can distinguish it through diameter About us: As a HID manufacturer ,we do HID in china for 5 years. We insist on high quality all the time and only QUALITY is our enterprise life. So We are the winner in southeast Asia based on our high quality, our service, our technology service and our) priorities. About quality certification: 1)Our products have passed CE ,Emark (E13,E26),Rohs,TUV etc. 2) our company also passed ISO 9001:2000. 80%t of our products are exported to worldwide per annum.