N53091 Easy TRACK Add On Helix Elements for N53061N scale lets you create big ideas in a compact space and thats exactly where every level counts. With the NOCH easy TRACK Helix, Add On Helix, you extend your helix by an additional turn and give your layout noticeably more depth. With 329 362 mm track radii and the choice of single track or double track operation, you gain planning flexibility while keeping your route flow balanced and convincing. An extra level changes the way operations feel: