About this product: CUPBOARD SLIDING DOOR ROLLER KIT: package includes 2 sliding door wheels and 2 fixing parts. MATERIAL SLIDING DOOR ROLLER: The cabinet sliding door wheels are made of environmental iron alloy, strong and durable, strong and not easy to fade. LOADING CAPACITY: 20KG. Make your life more convenient, no longer need a repairman, and no need to change a new wardrobe. QUIET OPERATION: Pulley wheel design provides better fit and smoother sliding, stable and safe to use. With the damping pad, they would run quietly and solidly, protecting you from loud noise and potential injury from the sudden slamming of the door. APPLICATION: Fits most sliding doors of closet, cabinet, windows, cupboard, cabinet, display cabinets and shoe cabinets etc.