our company supply different kind of quartz tubes. in cluding : clear quartz tube, opaque quartz tube, clear quartz rod, opaque quartz rod. the products size as follows:Quartz tubes: OD 4mm-180mm ID 3mm-172mm .quartz sheet. Our products quality is good (our products quality can reach  GE standard or better than GE)and the price is very competitive. If you have any other require or question, please kindly inform us ,we will try our best to meet your rquire. Best regards.