【Silent Aluminum Double Curtain Track】Crafted with military-grade aluminum alloy, our double curtain track system effortlessly holds up to 110lbs (50kg) without sagging. The aluminum double curtain track maintains perfect straightness over time, while protective film coating prevents shipping scratches. The silent double curtain track design features silent strip, ensuring a smooth and noise-free sliding motion. 【Wide Double Row Curtain Track Design】PHUSTJKL double row curtain track features 4.56inch（116mm） extra-wide spacing between tracks - the widest in its class. This prevents curtain fabric collision while allowing lavish drapes and blackout liners to glide independently. Perfect for layered window treatments in upscale interiors. 【Universal Silent Ceiling Curtain Track System】PHUSTJKL heavy-duty silent ceiling curtain track works in 15+ spaces from nurseries to boardrooms. Its seamless aluminum double curtain track design eliminates light gaps and dust traps. Hospital-grade smoothness meets hotel elegance - ideal for light-sensitive sleepers and commercial spaces. 【Easy to Install】Everything you need in one package! This Double curtain track set includes rails, runners, end covers, and a full screw set. Upgrade your space with a durable, silent, and stylish curtain solution that enhances any room’s ambiance.Note: Tracks longer than 39 inch(100 cm) will be sent in sections, and we will provide connectors to ensure the smooth passage of the pulleys. 【Helpful Customer Support】There are many parts in the package, please feel free to find us via Buyer Message if meet the case of missing parts and assembly, we are always here for you. If you have custom needs, please also contact me. Note: Please confirm whether the size you measured is correct before purchase. Crafted with military-grade aluminum alloy, our double curtain track system effortlessly holds up to 110lbs (50kg) per meter without sagging. The aluminum double curtain track maintains perfect straightness over time, while protective film coating prevents shipping scratches. The silent double curtain track design features silent strip, ensuring a smooth and noise-free sliding motion.