The Thomas & Friends TrackMaster Harlod's Helicopter Helipad Mountain & 3 Way Tunnel set by Mattel is a plastic track set featuring a brown color and gauge 1 scale. It includes a helipad mountain with a helicopter, as well as a three-way tunnel for added play value. This toy allows children to create their own train layouts and engage in imaginative play with the beloved characters from the Thomas & Friends franchise. The combination of the brown color, plastic material, and specific track features make it a fun and creative addition to any toy train collection.