Shower door plastic track dimensions: 1/2-inch track × 7/16-inch glass. Our inner groove dimensions are 0.52 inches, designed explicitly for 7/16-inch glass. Not suitable for glass thicker than 7/16 inches. The appropriate dimensions will not take up too much of your time or space. Compatibility Note: Fits shower glass doors that are 7/16 inch thick. If you are unsure of the glass type, please measure the glass thickness with a caliper before making a purchase. Easy to Install: Shower Door Track Rail. This glass shower door lower rail assembly is used to keep the shower door properly aligned; no special tools or skills required. The sliding shower door bathtub enclosure made of an extruded metal frame is very easy to install together. Good Friction and Wear Characteristics: This sliding shower door bottom rail is made of a plastic material with a low static and dynamic coefficient of friction, making it 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-dampening effects. It also runs quieter, making it ideal for use in quiet environments, such as showers. Note: There is a slight gap (≤0.2 mm) in the undecorated area in the middle of the track, which is a standard design feature that ensures smooth sliding. This is not a defect. Please confirm that it is within the specified range. If you have any questions about the size of the glass, please get in touch with us before purchasing for assistance to enhance your shopping experience. Shower door plastic track dimensions: 1/2-inch track × 7/16-inch glass. Our inner groove dimensions are 0.52 inches, designed explicitly for 7/16-inch glass. Not suitable for glass thicker than 7/16 inches. The appropriate dimensions will not take up too much of your time or space. Compatibility Note: Fits shower glass doors that are 7/16 inch thick. If you are unsure of the glass type, please measure the glass thickness with a caliper before making a purchase. Easy to Install: Shower Door Track Rail. This glass shower door lower rail assembly is used to keep the shower door properly aligned; no special tools or skills required. The sliding shower door bathtub enclosure made of an extruded metal frame is very easy to install together. Good Friction and Wear Characteristics: This sliding shower door bottom rail is made of a plastic material with a low static and dynamic coefficient of friction, making it 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-dampening effects. It also runs quieter, making it ideal for use in quiet environments, such as showers. Note: There is a slight gap (≤0.2 mm) in the undecorated area in the middle of the track, which is a standard design feature that ensures smooth sliding. This is not a defect. Please confirm that it is within the specified range. If you have any questions about the size of the glass, please get in touch with us before purchasing for assistance to enhance your shopping experience.