Fits everywhere: casters in showers, bathrooms, hot tubs. These rollers can be easily opened through our shower doors. Easy for you: the shower roller guide has to be replaced. You can do the repair yourself. Normally all you need is the right shower stall and a screwdriver. HIGH QUALITY: The shower stall roller set is the highest quality luxury shower door roller. Shower door casters are designed to combine high strength, excellent flexibility and ideal sliding properties. Easy to move: casters for showers and massage rooms, bathrooms, jacuzzis and even furniture. As a sliding door and system Feature: Replace shower door rollers for easy sliding. Replacement 23mm diameter shower door rollers. < p>These shower door rollers glide easily and are designed for 4-8mm thick glass doors. The roller construction is made of brass and plastic. Specification: Material : Copper + POM wheel Pulley diameter: 23mm Glass thickness: 4-6mm. Neckline: 15-17mm