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. Rectangular sight-glass fittings are available with a 5/8-inch 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.