GraviTrax Pro Vertical 20 Marbles race down.

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GraviTrax PRO Vertical Starter Set - Marble Run and STEM Toy Slightly Ripped Box

Unisex, Adult. Use to replace lost colored marbles or use as extra marbles when expanding your track and racing. The set includes 20 total marbles: 5 green, 5 red, 5 blue, and 5 silver. Each marble steel ball is in diameter also making them the perfectly sized option to replace marbles used with many other popular games and marble runs.

Botabee 20 Multi-Colored 1/2 Chrome Steel Balls for GraviTrax Marble Run | Coloured Marble Set Great for Racing, Rolling | Colored Marbles Compatible