Precise Size Design: rail length 3 inches, width 1-1/2 inches, wall height 9/16 inches, channel width 1/2 inches, perfect fit for glass doors up to 7/16 inches thick; Compact structure saves space, easy and fast installation. Easy and Quick Installation: No need for specialized tools or complicated operations, the metal frame and plastic rail assembly are easily aligned and assembled to ensure the smooth operation of the shower door, and the installation can be completed by one person. High Strength and Durable Material: Made of high quality black plastic structure, strong impact resistance, not easy to be deformed or damaged in long term use, durable and long lasting. Smooth and Wear-resistant Track: Optimized design of low-friction track saves effort when pushing and pulling, reduces daily wear and tear, and lasts longer. Smooth and Reliable Performance: Precision construction ensures that the shower door is always aligned, sliding steadily and smoothly, enhancing the overall experience of use. Precise Size Design: rail length 3 inches, width 1-1/2 inches, wall height 9/16 inches, channel width 1/2 inches, perfect fit for glass doors up to 7/16 inches thick; Compact structure saves space, easy and fast installation. Easy and Quick Installation: No need for specialized tools or complicated operations, the metal frame and plastic rail assembly are easily aligned and assembled to ensure the smooth operation of the shower door, and the installation can be completed by one person. High Strength and Durable Material: Made of high quality black plastic structure, strong impact resistance, not easy to be deformed or damaged in long term use, durable and long lasting. Smooth and Wear-resistant Track: Optimized design of low-friction track saves effort when pushing and pulling, reduces daily wear and tear, and lasts longer. Smooth and Reliable Performance: Precision construction ensures that the shower door is always aligned, sliding steadily and smoothly, enhancing the overall experience of use.