There are groves in two sides in which the rails sit. The key features of this new design are Height - 15mm.
3 Track (00/HO Gauge Parallel Track Tool for 00/HO Gauge Track/Hornby) PACK OF 4
3 way 67mm gauge parallel track spacer for 00/HO gauge track / Hornby PACK OF 4
2 way 67mm gauge parallel track spacer for 00/HO gauge track / Hornby PACK OF 4
51mm (00/HO gauge parallel track spacer tool for 00/HO gauge track/hornby)
