Schott Duran® and Corning Pyrex® tubular gage glass is offered as Red Line, High Pressure Clear, Heavy Wall Clear, and Heavy Wall Red Line. Diameters range from 1/2″ OD to 1 1/2″ OD. End finishes may be cut, ground, or fire polished depending on application. Pressure ratings range from 90 PSI to 600 PSI depending on end finish, diameter, and length required.