Our complete product line of precision drawn two and four bore tubing's in Borosilicate glass has excellent insulating qualities. They are utilized in thermocouple and electro-chemical probes, and other applications that require a great degree of insulating/isolating safety characteristics. Custom product to a customer's specification is also available. Sold in 1' increments. Can be supplied in lengths up to 4' long if requested. Some items are stocked, but others will have a lead time. Contact us for availability.