Voltage,Watt,Outer diameter(OD) ,Wall thickness (WT) ,color,shape and length can be designed,produced and processed as required. Donghai Quansheng Quartz Products Co., Ltd. is a professional manufacturer and exporter of clear or unclear quartz tube, IR heating elements, like quartz tube heater,tungsten halogen heating lamp, carbon heater tube, infrared lamp,quartz heating lamp,quartz heater tube, ...