GraviTrax Transfer $12.99 Default Title - $12.99 Quantity This product is coming soon. Please fill in the form below if you'd like to pre-order this item! Propel the action! The Transfer takes your marbles over a breath-taking gap for a spectacular eye-catcher! Combine the Transfer with your GraviTrax Starter-Set to get your marbles across longer distances. How far will your marbles travel? Recommended for ages 8 years+.