Robomow RC can handle a narrow passage of 1m (1.2m for RS/MS models) and wider. The length of a narrow passage can be up to several meters.
If the Narrow Passage is wider than 2m (6.5ft.) and you want Robomow to mow the area inside the narrow passage, you can set the perimeter wire in a way that allows Robomow to mow inside the narrow passage but prevents it from crossing between the zones.
Robomow RX can handle narrow passages of 57 cm and wider. The distance between the perimeter wires in such passage should be at least 15 cm.