Welded into a vessel or a pipeline, these rugged fittings provide either flow or level indication. They are available in carbon steel, stainless steel and special alloys. Obround visible glass sizes range from 1 to 4″ in width and 6″ to 24″ inches in length, and are suitable for ASME code requirements. Custom designs are also available; inquire with your local representative or L.J. Star expert.