These blackout panel track blinds are designed for sliding doors, patio doors, large windows, and room divider applications. The adjustable track extends from 45.8" to 86" wide, and the fabric panels can be trimmed for a better fit. Made with durable polyester fabric and a blackout coating, they block up to 99% of incoming light for privacy and room darkening. The smooth sliding track supports quiet operation with flexible left or right opening. A top valance helps create a clean, polished appearance.