Borosil manufactures and exports high quality tubing, blown ware and press ware using state of the art equipment. They offer kettles for organic reactions involving viscous materials. The wide mouth permits easy access to the interior for cleaning purposes. Covers are of heavy construction and lower sections are mould blown for maximum resistance to mechanical breakage. Covers are provided with openings with identical joints for rapid assembly with condensers, stirrers etc. Flanges of covers and bottoms are finely ground for a tight seal.