1.Quartz glass 2.E4 E-MARK Certification Approved 3.80% Krypton gas 4.3000 ... Steel.l We can supply Glass material as, Hard Quartz, corning.l The life time is below, Quality A ... as:Iron,Copper,Stainless Steel and GlassMaterial as:Hard,Quartz,CorningLife time:Qualilty A>=500 hrsQuality B>=350 hrsColor ... :clear, blue, rainbow and yellow, etc.E-Mark certified:H1,H4,H7 Auto Halogen BulbsOEM:Accept OEM ...