... life.• Options1) Y/U/V /H groove, 2) single or double bearing.3) diameters: 50, 60, 70, 80, 90, 100,120 ... hardware parties applied to the Sliding Gate, Cantilever Gate, Hanger Gate/Door, Driveway Gates, Swing Door/Gate, Retractable Gates, Rolling Gate and the Fences etc. We ...