Space Machine offers a standard product line of mica double ridge pressure windows covering waveguide sizes WRD180 thru WRD200. VSWR is 1.15:1 maximum, while insertion loss is 0.1dB maximum over the full waveguide bandwidth. Pressure handling capability is 20 PSI minimum, however higher capacities up to 30 PSI are usually obtained. Please specify pressure requirements when ordering. Additional sizes and configurations are available upon request.