Material: Made from plastic, each pulley measures 2.6 x 1.2 cm (1.02 x 0.47 in) and weighs 60 grams. Smooth Sliding: Engineered for smooth and quiet curtain movement on rail systems. Versatility: Suitable for various curtain types, from light drapes to heavier fabrics. Set Quantity: Package includes 50 pulleys for replacement or new installations. Application: Designed for use in residential and commercial curtain track systems.