Spacerail Level 4 is an intermediate build-it-yourself marble run. Featuring multiple paths for your marble to travel including a vertical corkscrew, consecutive loops, and a screw conveyor elevator. Features: Helix elevator to carry SpaceRail marble to the top Two different tracks for marble to travel Vertical corkscrew Full consecutive loops Multiple curves, spirals, and drops Estimated build time: 2-4 hours* Contains: 26,000 mm track line Two steel .5" marbles Screw Conveyor Elevator Arms and holders to place SpaceRail track Freestanding base to fit entire marble run English instruction manual Batteries and cutting materials (scissors) are not included in the marble roller coaster kit. Spacerail marbler roller coasters are recommended for users that are 15 years or older. *Build time is an estimate and varies based on experience