The window rail is the key to the overall appearance and durability of the curtain. The strength, smoothness and noise of the window rail are the main criteria for judging the quality of the window rail. The quality of the window rails determines the smooth opening and closing of the curtains. 1. The window rail can be divided according to its shape: straight rail, curved rail, telescopic rail, etc., mainly used for windows with curtain boxes. The most commonly used straight rails are: heavy rails, plastic sodium rails, low-pitched tracks. 2, window rail according to its material can be divided into: aluminum alloy, plastic, iron, wood and so on. 3, according to the process of the window rail can be divided into: Roman rod, art pole and so on. Roman rods, art èµ£ for windows without curtains, with decorative features Auto Led Headlight,Led Headlights For Cars,Led Headlamp For Car,Automotive Led Headlights CHANGZHOU CLD AUTO ELECTRICAL CO.,LTD , https://www.cld-leds.com