The requirement is for one vacuum chamber slit with a maximum aperture of 7 mm x 7 mm and high precision motion, offering sub-micron repeatability and ±3 micron accuracy. The slit must be vacuum compatible to 10?5 mbar using O-ring sealing and low outgassing materials, with standard 2 mm thick tungsten carbide blades and 2-phase stepper motors. All components, including raw materials, must be of USA origin, with manufacturing also domestic. Additional requirements include internal limit switches, KF-40 flanges, M6 mounting holes, and a 10-meter cable between the customer feedthrough and controller. Optional features such as alternative blades, adaptors, and enhanced vacuum preparation are available.