WHAT YOU WILL RECEIVE: You will receive 100 sliding curtain track rollers, sufficient quantity can meet your different uses and replacements in your daily life, providing you with more convenience. DIMENSIONS: Our curtain rod pulleys measure 29mm / 1.14 inches in length, wheel diameter 15mm / 0.59 inches and wheel spacing 11.8mm / 0.46 inches, suitable for most curtain rods. DURABLE AND RELIABLE MATERIALS: This white plastic pulley is made of high-quality aluminum alloy hooks and plastic rollers. The rollers are smooth and the hooks are strong and durable, it can be used for a long time without being easily damaged and deformed. EASY TO INSTALL: You just need to connect the curtain track gliders to the ceiling track, and the smooth rollers can easily slide inside the track to carry the curtains. Installation and removal are very simple. WIDE APPLICATION: The track gliders are an ideal addition to your home curtains, and also suitable for closet doors, shower curtains, room dividers,