1/4" OD x 4.0 mm ID x 60 cm length Glass Lined Tubing. Glass Lined Tubing (GLT) for GC by SGE exhibits excellent resistance to extremely harsh conditions as well as to strong acids and bases. Maximum temperature for continuous use of GLT is 500°C. This tubing is the ideal choice for HPLC columns, especially biological matrices, GC/MS interfaces, FTIR transfer lines or inlet liners.