Base and Inner Tube for Agilent 5000 Series D-Torch. Compatible with Agilent 5000 SVDV/VDV/RV Series ICP-OES. Requires choice of quartz or ceramic outer tube & injector.A patented, demountable torch with a ceramic intermediate tube for greater robustness & demountable outer tube that is replaced when it fails rather than replacing the entire torch. 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, demountable ceramic outer tube (501907233 for SVDV/VDV, & 501907236 for RV). The quartz outer tube (NC2125299 for SVDV/VDV, & 501907234 for RV) is ideal for most applications while the ceramic outer tube is best for high TDS, organics, or HF matrices.Replacement parts 31-808-2962, 31-808-3566, 31-808-3578, 70-803-1500.Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001