Marble Run; Marble Parkour Skid Plates The behind-the-axle (BTA) steering link

The behind-the-axle (BTA) steering link greatly improves approach angle and front-end clearance

in two hours

Light-weight

70mm Assembled

Marble Run; Marble Parkour Skid Plates The behind-the-axle (BTA) steering linkRobotime ROKR Big Funnel Marble Run LG501 is a mechanical gears 3D wooden puzzle based on great human engineering. Its design combines the beauty of science and machines, involving so many small gadgets. Build this Rokr marble run 3D wooden puzzle set and crank the handle, watch marbles run crazy down the slopes and twisting turns. Have fun! FUNNEL RAIL: LG501 Marble Parkour is a handcrafted marble run 3D wooden puzzle set with a big funnel rail.