Ugears Marble Run Spiral Hoist ★Mechanical 3D Puzzle Kit Model Toys Gift Present Birthday Xmas Christmas Kids AdultsModel size: 11. 2*10. 4*10. 9 in (28. 5*26. 3*27. 6 cm) Package size: 14. 9*6. 7*1. 3 in (37. 8*17*3. 4 cm) Number of components: 266 Estimated time of assembly: 6 hours Level: Advanced The Marble Run Spiral Hoist is the fourth model in the Ugears collection of fascinating DIY wooden mechanical marble runs. The hoist has two types of rails to speed the ascent: the main spiral rails and vertical rails. Turn the crank to lift the colored glass marbles