Vacuum airless Vacuum Tube Schlenk Capacity (mL) 100. Approx. Stem O.D. (mm) 13. Approx. Body O.D. x Height (mm) 38 x 150. Approx. Overall Width x Height (mm) 80 x 235 Tube has a HI-VAC valve to control gas flow to the reaction tube. Suitable for use with