Space Machine offers a standard product line of mitered E and H plane mitered bends covering the waveguide sizes WR28 thru WR650. VSWR is less than 1.10:1 over the full waveguide band. wr* – add HW, RH or TW to the part number if ordering heavy wall waveguide tubing (HW), reduced height waveguide tubing (RH) or thin wall waveguide tubing (TW).