GraviTrax Tunnel extension is a great tunnel system and provides on the ball track for many moments of surprise. Especially if the tunnels are directly connected to the switch therefore spectators can not calculate where the ball will be next. With the tunnel system, the ball track has not only got roofed components for curves and straights, but also branches, two half loops and four new rails. Includes 4 x tunnel curves, 2 x tunnel straight lines, 2 x tunnel switches. 2 x vertical U-turns, 2 x Bernulli rails, 1 x O-rail upwards, 1 x O-rail downwards and 2 x catch baskets.
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