... be customized 2.Height:1.6-1.8m 3.Type:single track,double track, no track Electric expandable gateDetailed description for ... choose : original10.Max length: 30m11. Type of gilding track: No track, Single track, Double track12. The unique infrared collision avoidance system ... reducing rolling and inertial damage of the head.15. Double self-lock to prevent any manual lifting16. Contact-free control in ...