Shower door plastic track dimensions: Suitable for 1/2-inch tracks × 9/16-inch glass. Our inner diameter track size is 0.52 inches, designed explicitly for 7/16-inch glass. Installation instructions: Suitable for shower glass doors with a thickness of 9/16 inches. If you are unsure of the glass type, please measure the glass thickness with a caliper before purchasing to ensure smooth sliding. Material: The shower door rail is a white plastic structure, made from high-quality material, which is resistant to damage and has a long service life. Good Friction And Wear Characteristics: this sliding shower door bottom rail plastic has a low static and dynamic coefficient of friction, and the material is wear-resistant. This helps to extend the service life of the guide. Easy To Use: This is the best alternative to glass shower door rail components. It is easy to install, dampens vibrations, and has sound sound-dampening effects. It also runs quieter, making it ideal for showers in a calm environment. Note: A slight gap (≤0.2 mm) is intentionally designed to ensure smooth sliding—this is not a defect. If you have any questions about the size of the glass, please contact us for assistance before making a purchase. Shower door plastic track dimensions: Suitable for 1/2-inch tracks × 9/16-inch glass. Our inner diameter track size is 0.52 inches, designed explicitly for 7/16-inch glass. Installation instructions: Suitable for shower glass doors with a thickness of 9/16 inches. If you are unsure of the glass type, please measure the glass thickness with a caliper before purchasing to ensure smooth sliding. Material: The shower door rail is a white plastic structure, made from high-quality material, which is resistant to damage and has a long service life. Good Friction And Wear Characteristics: this sliding shower door bottom rail plastic has a low static and dynamic coefficient of friction, and the material is wear-resistant. This helps to extend the service life of the guide. Easy To Use: This is the best alternative to glass shower door rail components. It is easy to install, dampens vibrations, and has sound sound-dampening effects. It also runs quieter, making it ideal for showers in a calm environment. Note: A slight gap (≤0.2 mm) is intentionally designed to ensure smooth sliding—this is not a defect. If you have any questions about the size of the glass, please contact us for assistance before making a purchase.