These shower door rollers are built for curved glass doors in humid spaces like bathrooms, steam rooms, and RVs. Made from zinc alloy with chrome and gold plating, they resist corrosion and wear over time. The 23mm diameter wheels fit glass thicknesses from 4mm to 6mm and accommodate glass openings between 12mm and 14mm. Upper pulleys adjust up to 8mm in height using stainless steel screws, while lower springs self-adjust based on upper wheel positioning. Installation requires no specialized tools, and the design prevents jamming or breakage under normal use. Rolling action is smooth and silent, eliminating squeaks during operation. The set includes five top and five bottom rollers, covering standard two-door curved enclosures. All components work together to maintain alignment and consistent contact with the track over time. Color: Silver.