Description: High Quality: Adapt to different types of showers. Make sure your door slides more comfortably No need to decompress and waste money: Did you buy a sliding system and it breaks? You think with horror that now you have to buy a new one. Forget There are replacement shower door rollers to suit any sliding system in your home. If you're having trouble with your sliding shower door, use this quick solution and don't waste your money. Use anywhere: shower door slides, massage rooms, bathtubs, hot tubs, even on furniture accessories. Make sure the door opens easily and smoothly. Replace damaged systems. Advanced Shower Roller Rolling Assembly: The door rolls smoothly and the shower hydromassage box can easily move forward or backward slightly, clearly performing the tasks assigned to them, distributing the mass of the glass and controlling the movement in a given direction. This makes the product more durable and lasts longer Package Contents: 4 pieces bearing ball pulleys (with stainless steel mounting screws)