The CRL Duo-Vent Truck Slider is the finest four-panel Truck Slider on the market. It's our attention to the details that makes the Duo-Vent so special. The state-of-the-art fully contoured, thin profile, powder-coated aluminum frames have narrow stiles for maximum rear view, and tight-sealing weatherstrips to protect the interior. Tempered safety glass in up to four color choices, and metal locking latches for cab security are all features that make CRL Sliders stand out from any others.