This listing is for a double lane to two single lanes and back to a double lane. Is a little under 23 inches long and a little over 15 inches wide. 4 3/4 double track spacer.
Spacer will be needed along with two 9 inch tracks on the other side, to equal the distance of this. Original track is not included only in picture for reference. There are also no 9 inch tracks included only mentioned for reference of the total length of this piece. Rails are plastic covered with aluminum.
Piece is pretty cool but not perfect.