These glass, inline adapters are designed to work with our Sample Seal- liquid sample holders. These adapters have 1, 0 to 4 mm adjustable high-vacuum CG valve which produces a leak-tight o-ring seal. They are designed with 2, inline #9 O-ring joint outer diameter glass connections. These adapters are designed to withstand pressurizing up to 50 PSI and are often used in molecular spectroscopy experiments to control the flow of a precursor liquid sample. For connections at the #9 glass joint flange they require a #9 O-Ring and pinch clamp size of No. 18 and require a #112 O-ring. Replacement o-rings are sold separately, please call 505-872-0037 for more information.