Our online catalog is being updated! Please contact us for current pricing. ISO Flanges & Fittings Assembly Each assembly consists of two symmetrical flanges, a centering ring, an O-ring and a clamp. The connection is made without tools and is completed by simply tightening the wing nut on the clamp.    +       =     Clean and Leak Tested All components sold by Thermionics are clean and ready for immediate use. During assembly, all components are helium mass spectrometer leak-checked prior to shipment. The sealing surfaces are specially machined to ensure perfect repeat sealing. This surface quality enables the slightest damage to be detected by visual inspection. To ensure the cleanliness and quality of the components until they are put into use, TLI employs vacuum shrink wrapping of each component. This technique prevents damage in shipping and storage. Note All TLI/ISO fittings are manufactured to the ISO standards, and therefore, are compatible with other vacuum components designed to the same standards. Thermionics offers as a convenience other TLI fittings, feedthroughs, vacuum components, and accessories with these fittings. Large ISO Flanges Flanges for tube sizes greater than 2"(50mm) diameter are available. Please consult factory. To Order To order ISO fittings on any TLI component add ISO+ flange size. For example, if you are ordering an inline valve (L-1500-P) you would then add (ISO-40) to the end to get (L-1500-P-ISO-40).