A large international company sent us a letter recently writing, "I would like to thank you for getting us involved with Menda vacuums and filters. Since we have switched over to the Menda vacuums and filters we have decreased our down time from approx. 20% to 0% in our Color Dept. and Remanufacture Dept. In our vacuum areas, the Menda filter turned out to be a large asset to our company."