Length Approx 4880mm long Designed to fit the width of single track with indentations to fit the sleepers Strip is flexible to follow any straight or curved track & is easily cut to make junctions at points & cross-overs Resilient foam underlay fits under track to simulate a full-size ballast track bed It also damps out vibrations so trains run more quietly & these is less chance of wheel bounce to spoil performance Cut the underlay to shape with scissors