Sliding and closure of sash windows.

The arrival of the new Win Twin R1 series moved the standards for sash slide and closure technologies to a higher level. The R1 series embodies the lightest, smoothest, most advanced and compact of technologies in sash windows. The size and weight have been reduced to a minimum, and moreover the sliding friction has been minimized through the application of Micro Guide® technology. The results: maximum slide comfort, and high quality closure.