The Venice Pro Series Thermal Break Sliding Window Is a premium sliding window system designed for high performance and contemporary aesthetics. With frame depths of 93 mm (4 tracks) and 140 mm (6 tracks), and profile thickness ranging from 1.4 mm to 3.0 mm, the system provides excellent structural strength https://www.eehewindows.com/the-venice-pro-series-thermal-break-sliding-window-product/