The spiral inner tube of these borosilicate glass Friedrich condensers contains the coolant which fits closely within the jacket so vapor must pass along spiral in a thin layer. Two hose connectors and an angled Standard Taper outer joint (extending upward at a 15° angle) are attached to upper end of jacket and Standard Taper inner joint with a drip tip of the same size is at the bottom. 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.