Our N Scale Helix Kits come in two sizes, Large or Small with either 4-1/2 or 5-1/2 turns on each to achieve 14-5/8" or 17-7/8" overall rise respectively. They are suitable for either single or double track configurations utilizing a 6" wide sub-roadbed.

Radius for the single track Large Helix Kit is 26", 22" on the Small Helix Kit. Radii on the double track Large Helix Kit is 25" and 27", while radii on the double track Small Helix Kit is 21" and 23".

More details for each Helix Kit can be found in the product descriptions.

Prices include shipping costs to Canada and the Continental United States.