SpaceRails 70, 000Mm Rail Level 9 Game Marble roller coaster track with three screw conveyor elevators to carry SpaceRail marble to the top Includes multiple different tracks for the marbles to travel, multiple consecutive loops, seesaw drops, drop-through steps, a weighted lever, two vertical corkscrews, and multiple curves, spirals and drops. Estimated build time: 25-35 hours Contains: 70,000 mm track line, Two steel .5 in. marbles, Three Screw Conveyor Elevators, Arms and holders to place SpaceRail track, Connecting freestanding bases to fit entire marble run, and English instruction manual Recommended for ages 15 and up