HIGH QUALITY: Made of high-quality zinc alloy, this curtain roller is extremely durable. All rollers move smoothly along the track. Lightweight yet sturdy gliders ensure easy sliding. PERFECT SIZE: This metal rail roller measures 18mm in overall width, 14mm in total length, and 9mm in pitch. Versatile design ideal for curtains, sheers, shower curtains, and more. 360-DEGREE HOOK DESIGN: Features a swivel hook for smooth rotation on the rail. Silent wheels are rubber-coated to ensure quiet, smooth operation, enhancing a calm and elegant living environment. EASY TO USE: For pleated curtains with needle hooks, simply insert the needle hooks into the eyelet at the bottom of the carrier. For curtains with grommets or loops, attach the hooks as needed. WIDE APPLICATION: Ideal for curtain panels, room dividers, drapes, and valances. Suitable for use in windows, closets, bedrooms, offices, restaurants, and sliding doors.