These adapters allow the Gravitrax Junior, Lego and Lego Duplo systems to be combined with each other. The product consists of two parts:

- An adapter that is used as a height block for Gravitrax elements and can be plugged onto Lego/Duplo elements.
- An adapter that is used as a base plate for Lego/Duplo elements and can be placed on Gravitrax height blocks.

The adapters are cast by hand from polyurethane resin and are therefore made of solid and robust plastic. Due to their appearance, they fit very harmoniously into a Gravitrax track. The connection with Lego elements is stable and firm, just as you would expect from Lego bricks.