Hardware Sliding Window Roller Steel Sliding Door Wheels Gate Roller With Bearing Product Attributes Attribute Value Material Steel Load capacity 80kg Wheel Color Any color Style Modern design Type Sliding Door And Window Rollers Function Quiet operation Product Advantage Corrosion Resistance: Often coated or treated to resist rust, especially for outdoor use. Top-Rolling Wheels: Mounted on the upper track, common in hanging sliding doors. Bottom-Rolling Wheels: Support the