The TVR series of vacuum tubes are made of steel coil. They have rigid designs that ensure no loss of pressure. The internal diameters of the TVR 10, 15 and 20 models are 10mm, 15.5mm and 19.5mm. The external diameters are 18mm, 30mm and 37mm.
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.