Spacer for lateral slide removable seat

A rail and carrier system for first and second removable seats for a motor vehicle includes two lower rails fixedly attached to and positioned laterally along a floor of the motor vehicle. Two upper rails are nested with and laterally slidable within each of the first lower rails. Cross brackets are laterally spaced apart and arranged perpendicular to the upper rails. Covers are connected to and extend between the cross brackets. Spacers are located laterally between upper rails within the lower rails. The spacers include a first shoe located in the lower rail, a second shoe located in the lower rail, and a first bracket connecting the first shoe and second shoe. The first and second shoes prevent the upper rails from contacting each other.