The Round hollow capillary product line is available in a broad combination of inner and outer diameters (ID and OD) in Borosilicate. Besides tolerance listed in the table, custom sizes with tighter tolerances are also available. These Custom lengths and sealed ends are available upon request. 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