halogen bulb h4: 1.Volts:12V/24V 2. Quartz glass 3.Base:P43T/P45T light color:white,blue,yellow,crystal blue halogen bulb h4:H1,H3,H4,H7,H8,H9,H10,H11,H13,9004,9005,9006,9007 Volts:12V/24VBase:P43T/P45TMaterial:Quartz glass+stainless ironlight color:white,blue,yellow,crystal blue,crystal yellowProduce by clients' demand.