or
Column, Capillary GC; MXT-20 (Silcosteel) Capillary Column; 30m length; 0.53mm I.D.; 1.00microm df; Temp. Limits: -20 to 295 deg. C
Column, Capillary GC; MXT-20 (Silcosteel) Capillary Column; 15m length; 0.25mm I.D.; 0.25microm df; Temp. Limits: -20 to 320 deg. C