Glass Tubing is a hollow piece of laboratory glassware mainly functioning as a conduit or a jointer between two pieces of laboratory equipment. Also known as Glass Tubes, it is made of borosilicate or flint glass, which is used in the production for its specific physical features. As per the need, glass tubing is commercially available in various thicknesses and lengths. Its construction is cylindrical with varying diameters. In earlier times, scientists would modify it to meet the desired type of application. Modifying glass tubing is no more a necessary lab technique; however, it is still preferred by many.� A glass cutter is used to resize a piece of glass tubing into smaller tubes. The smaller tubing is then flame polished to smoothen the rough edges.