[Quiet and No Noise]: There is a unique mute block design in the middle of the curtain rail track pulley, which will not make any noise when the curtain is drawn, don't worry to disturb someone who sleeping. This wheel conveyor is suitable for compartment curtain tracks. Carriers move easily from one runway to another and from open to closed.[Lightweight & Heavy Duty & Smooth Sliding] The metal ring can rotate 360, ensure that the wheels move freely and slide smoothly in the track. The mixed material design of metal+PP material makes the pulley light but high load-bearing. The material has strong environmental adaptability and can be used normally even in humid places[Zinc Alloy+PP Material, Sturdy and Durable]: The curtain roller gliders is made of high-quality zinc alloy and environmentally friendly PP material. It has the characteristics of light weight but heavy load, sturdiness and durability. All-plastic pulley is easy to break, our product obviously can avoid this problem. and it can be used with confidence for heavy curtains. All curtain rollers can smoothly roll and slide in the track.[Easy & Convenient]: This curtain rail track pulley is suitable for most square pulley tracks. For pleated curtains with needle hooks, simply insert the needle hook into the buttonhole at the bottom of the bracket. For curtains with holes or loops on the back, just add hooks.[Ideal Pulley Accessories for Curtains] Curtain pulleys are very suitable for installing curtain panels, room dividers, curtains, curtains and valances. It is widely used in windows, wardrobes, bedrooms, offices, restaurants, sliding doors, etc.