Sunpower's CryoTel® cryocoolers are the result of over 40 years of technical leadership, innovation, and evolution in free-piston Stirling technology. Our cryocoolers are cost effective, exceptionally quiet, low in vibration, and extremely efficient. Since they require no maintenance, our customers can expect many years of high-performance, trouble-free cooling. For temperature requirements between 40 K and 200 K there is no better alternative with respect to small size, efficient operation, and price. CryoTel cryocoolers are particularly well suited to telescopes as they are highly efficient, reliable, and do not require transfer lines or high input power. In addition, the new Active Vibration Cancellation system will significantly reduce vibration even further for sensitive applications.