High quality: Fits various types of showers. Ensures your doors slide more comfortably. No decompression, no waste of money: Did you buy a sliding system and it broke? You think with horror that now you have to buy a new one. Forget it! There are replacement shower door rollers that fit any sliding system in your home. If you're having trouble sliding your shower door, don't waste your money on this quick fix. Use it anywhere: shower door slides for showers, massage rooms, bathtubs, jacuzzis, and even furniture accessories. Ensure the door opens easily and smoothly. Replace the damaged system. Premium Shower Roller Rolling Components: Doors roll smoothly, move slightly forward or backward, shower enclosures are effortless, hydromassage cabins clearly fulfill their assigned tasks, distributing the quality of the glass, Controls movement in a given direction. This makes the product more durable and lasts longer Wheel Diameter: 20 mm Shipped Quantity: 4 (with screws)