CUPBOARD SLIDING DOOR ROLLER KIT: The package includes 2 sliding door wheels and 2 fixing parts. SLIDING DOOR ROLLER MATERIAL: The cabinet sliding door wheels are made of environmental iron alloy, strong and durable, tough 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 damping pad, they would work quietly and solidly, protecting you from noise loudly and potential injury from the sudden slamming of the door. APPLICATION: Fits most sliding doors of closet, wardrobe, windows, closet, wardrobe, display cabinets and shoe cabinets etc.