Features:CURTAIN TEACK ROLLERSYou will receive 50pcs x curtain track rollers, enough quantity for your entire curtain system installation process. They are made of plastic and metal for durability and a smooth finish that won& 039;t rust or warp or scratch your curtains.CLASSIC COLORSThis curtain track hook has a white and silver look that complement your curtain style and home decoration. The double-wheel design makes them fit snugly with the curtain track, slide smoothly and reduce noise.EASY TO USEAs long as your curtain track is the right size, you can easily hang the roller, then hang the hook and curtain (not included). Please make sure the roller fits your curtain track before purchasing. Once installed, the curtain is easier to be opened and closed.WIDE APPLICATIONThe slide roller is applicable to most square pulley rails, and is suitable for hanging curtains, room dividers, shower curtains, backdrops and to create beautiful pleated curtains for kitchens, offices, bedrooms, bathrooms and more.HOW TO CHOOSEYou can measure the size of the curved rail when purchasing. The height of the track must be greater than the diameter of the wheel (0.9cm/0.35inch), and the width of the track must be smaller than the inner width of the roller (1.1cm/0.43inch). Please check the graphic details.Specifications:Material: Plastic, metalColor: WhiteTotal size: (Approx)(LxW) 3.7x1.5cm/1.46x0.59inchInner width: (Approx) 1.1cm/0.43inchWheel diameter: (Approx) 0.7cm/0.28inch, 0.9cm/0.35inchPackage Included:50pcs x Curtain track rollersNote:1. Due to the light and screen difference, the item& 039;s color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement.