Please note: This is a Sole Source Notification. Specifications include, but are not limited to: Montana State University Procurement & Contract Services is considering a request from the Physics department, to award a Sole Source contract to Four9 Designs for a low vibration cryostat with external magnet. A closed cycle cryostat that is compatible with the atomic force microscope from Renaissance Scientific. The cryostat chamber must have a diameter of 250 mm and be 220 mm tall. It must have optical ports to allow light to be coupled to the atomic force microscope. It must also have an external magnet that can apply a magnetic field of 1 Telsa in all three cartesian directions. It must also minimize vibrations for scanning probe microscopy measurements.