We fabricate a complete line of high quality Rectangle Tubing in Borosilicate glass that can be drawn into various sizes. Rectangle hollow capillary tubes provide the fastest, cleanest, most convenient method for collecting, viewing, and storing liquid samples. Capillary action instantly collects the sample and retains a precision optical path length while viewing at any angle, minimizing reflections and eliminating the need of a cover glass. With 13 years experiences in glass fabrication, self-designed equipment and highly qualified staff of engineers and technicians, we are ready to meet your most demanding requirements or simply ship from our stock catalog items.