Window Hardware Steel Sliding Door Wheels Window Roller 22mm U Groove Pulley Wheel with Bearing High-quality steel sliding door and window rollers with nylon pulley wheels, designed for smooth, quiet operation with a modern aesthetic. Suitable for various sliding applications including doors, windows, and furniture casters. Key Attributes Material Steel Load Capacity 20kg Wheel Color Custom colors available Bearing Type Ball bearing Thickness 1mm Product Advantages Corrosion