Installation is easy: fingertip pressure locks the bushing into .875" (22,2 mm) diameter holes in panels up to .125" (3,2mm) thick. Reinforcing ribs provide extra strength and the bell mouth contour, radiused at 1.5x the exit hole diameter, eliminates the need for a separate cord guard. These strain reliefs protect cables against forces of pull, push, twist, and flex. Will fit cables with Flat Cross Section and approximate size up to .250 x .400 in (up to 6.4 x 10.2 mm). Price is for a package of 10. Unused.