Thorlabs offers a growing line of high-vacuum-compatible CF viewports, flanges, components, and hardware. High-vacuum (HV) systems are capable of reaching and maintaining pressures down to 1 × 10-8 Torr. Our Ø2.75" HV CF Viewports support Ø1" or Ø1.5" windows. We also offer a Ø2.75" HV CF Viewport fitted with a Ø10 mm CVD diamond window. Viewports designed for Ø1" windows are compatible with our selection of stock Ø1" windows, while viewports designed for Ø1.5" windows utilize either flat or wedged Ø1.5" High-Precision Vacuum Windows. In addition to these viewports, we offer an adapter for mounting optomechanical components to a Ø2.75" CF vacuum flange.