Using the screws, the tray can be installed, Simple and convenient, save your time, much more convenient for leading the wires, with the screw easily adjusting the cable tray position and direction. Axle design, the red axle roll with your wire, protect your wire from wearing. In form semicircle and laying cable. Be suitable for outside, inside or the corner, leading the wire to where you want. Nylon and thicker body, strong and , weighing height, and smooth; High quality of stainless steel, much more stable. Color: Blue & Red Material: Stainless Steel + Nylon Package Contents: 5 x Cable pulley Only the above package content, other products are not included. Note: Light reflection 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.