This document discusses refurbished Perkin-Elmer sputtering deposition systems, including the Perkin-Elmer 4400 model. It states that these systems from the 1980s and 1990s have been proven as reliable "work horses" for production and research. It invites contacting the company by email to check availability of refurbished and upgraded Perkin-Elmer 4400 systems for sputter deposition.