This is a single-side flange for a 100mm O.D. tube with seven 1/4" tube fittings. It provides multiple feedthroughs for various gasses delivery and thermocouple insert.Specifications: Features SS304 Stainless steel flange with double high-temperature silicon O-rings Hex screw tube sealing with no welding or gluing needed. Ideal for any type of tubing: ceramic, glass, quartz, and steel pipes. Multiple feed-throughs for various gasses delivery and thermocouple insert. Structure Flange for 100mm O.D. tube Seven 1/4" feedthrough with ferrule tube fitting (The following pictures show an 80mm version, which has six feedthroughs) Feedthrough Configurations Please select the configuration from the options bar. 6 feedthroughs in the outside circle, 1 in the center. (Pic. 1) All 7 feedthroughs in the outside circle. (Pic. 2) Optional You may order a right-side single flange by clicking the picture below Vacuum Level 10-4 torr (molecular pump)and 10-2 torr(mechanical pump) Warning A refractory tube block is required in front of the flange to avoid silicone O-ring melting. Please consider purchasing our ceramic tube block. Please do not over-tighten the three hex screws on the flanges to avoid overpressure incidents. The recommended torque is 35~40 inch-lbs. For liability considerations, MTI does not recommend or endorse the use of any toxic, flammable or corrosive gasses with our flange assemblies. Please contact us with any concerns. Related Products Flange for Tube from 1" to 11" Vacuum Pump & High Vacuum Station STANDARD PACKAGE: Part Number Part Name Qty 1 Inner and Outer Flange 1 pair 2 Feedthrough Nut 7 3 Ferrule Fitting 7 pairs 4 Centering Ring 1 5 Hex sealing screws 3 6 High-Temperature Silicone O-ring (White) 2