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" in length, and are suitable for ASME code requirements. Rectangular sight-glass fittings are available with a 5/8" wide view and up to 70" in overall length. Custom designs are also available, inquire with your local representative or L.J. Star for details.