Track Compatibility: This pulley is only suitable for curtain track styles shown in the picture Package quantity: You will receive 30 curtain track pulleys to meet your needs for adding pulleys Load-bearing capacity: Stainless steel plus thickened plastic, the curtain rod can easily bear a weight of 40 kg, suitable for all styles of curtains Quiet and smooth: Black wheels, smooth sliding and low noise, creating a quiet and elegant atmosphere for the home Precise fit: Specially designed for this curtain track, the size fits the track groove perfectly, no complicated debugging is required, and the installation is convenient