Universal FitThese 23mm diameter curved shower door rollers are compatible with 4-6mm thick glass doors and can be adjusted to fit glass openings of 12-14mm. The upper wheel's height is easily adjustable up to 8mm with stainless steel screws, and the height of the lower wheel springs can be adjusted automatically according to the height of the upper wheel.Complete Set & Exceptional SupportEach package includes a comprehensive set of shower door wheels, consisting of 5 top rollers and 5 bottom rollers, designed to provide a complete solution for your curved shower door needs. Should you encounter any issues, rest assured that our dedicated customer service team is ready to assist you with a prompt refund or exchange, ensuring your experience is nothing short of excellent.Silent OperationExperience whisper-quiet sliding with our noiseless shower door wheels, ensuring a peaceful bathroom experience without the annoyance of squeaking doors.Effortless InstallationSimplify the process with our easy-to-install shower door rollers replacement. The adjustable upper pulley set ensures a secure fit with high load capacity, eliminating the risk of breakage or jamming.Versatile UseIdeal for a variety of bathroom settings, including showers, rv, steam rooms, and massage rooms, these rollers provide a seamless opening and closing mechanism for your curved shower doors.Durable Zinc AlloyCrafted from premium zinc alloy with a corrosion-resistant chrome and gold plated finish, these shower door rollers are designed for longevity and reliability in high-humidity environments.