... Steel.l We can supply Glass material as, Hard Quartz, corning.l The life time is below, Quality ... E4 E-Mark certificated, and meet the ISO9001:2008 Standard. Type:H1Spec.:12V 35W,55W,80W,100WVoltage(V):13 ... as:Iron,Copper,Stainless Steel and GlassMaterial as:Hard,Quartz,CorningLife time:Qualilty A>=500 hrsQuality B>=350 ... for us. Welcome to contact with us! quartz glass halogen bulb h1 clear e4 12v 55w