Inner joint adapter with compression cap, four saddle O-rings and one Viton O-ring for use with plain stem thermometers and inlet tubes; accepts Outer Diameters from 3 to 7mm. Scientists rely on the expertise and artistic skills of Wilmad-LabGlass engineers and glass specialists to manufacture NMR and EPR consumables and laboratory glassware of the highest quality. Used daily in academia, healthcare and chemical, petroleum and other industrial applications, Wilmad offers 7000+ items as part of their standard catalog as well as custom fabrication for individual glassware, glass repair services and OEM glass parts.