1.Quartz glass 2.E4 E-MARK Certification Approved 3.80% ... Copper and Stainless Steel.l We can supply Glass material as, Hard Quartz, corning.l The life time is below, Quality ... Steel and GlassMaterial as:Hard,Quartz,CorningLife time:Qualilty A>=500 hrsQuality B>=350 hrsColor:clear, blue, rainbow and yellow, ... be power for us. Welcome to contact with us! quartz glass halogen bulb h1 clear e4 12v 55w