1.Strong Load-bearing capacity:Bold copper shaft is more load-bearing 2.Ultra-quiet:Built-in smooth ball, sliding silent, smooth and powerful 3.Smooth:The upper rail is evenly stressed, stable and smoothly pushed and pulled; the lower rail slides smoothly, labor-saving and safe to use 4.Roller diameter 27mm. Suitable for arc or square old-style shower room. 5.Attention: 4-6mm door thickness, installation aperture 10-12mm. Installation steps: 1.Take the glass door out of the track 2.Unscrew the fixing screws and remove the old pulley 3.Install the pulley on the glass door, fix it with screws, and then install the screw cover Colour:White+gold Material:Copper+Stainless Steel+Nylon Size:27mm Package Contents: 8 x Shower Door Rollers Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.