Base and Inner Tube for D-Torch. Compatible with Glass Expansion D-Torch for Agilent (Varian) Vista, 700 Series Axial ICP-OES.A patented, precision-engineered, demountable torch, incorporating a ceramic inner tube for greater robustness. D-Torch also features an interchangeable injector, allowing installation of a specific injector, whether it be for aqueous (~2.0mm ID), organics (<2.0mm ID), high TDS (>2.0mm ID) or HF (alumina). The D-Torch is the only design with an optional ceramic outer tube (501907173). The quartz outer tube (501907139) is ideal for most applications while the ceramic outer tube is best for high TDS, organics, or HF matrices. Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001