Set of five acrylic overlays compatible with the Terraforming Mars player mats. The overlay helps to keep the game markers in place during the game. The overlays do not require assembly and ready to use out of box. Just peel off the protective film and place the overlay over the mat. This overlay has no backboard. The overlay has no adhesive. Please use adhesive spray or double-sided adhesive tape to stick the overlay to the player mat. PLEASE NOTE: - The game is not included. - This Item has two versions. This is for the SECOND and LATER PRINT RUNS and is not compatible with the First print version. Please check the last picture to identify the version of your player mat. This is a third-party accessory designed by Gaming Trunk. All product names are trademarks of their respective owners, which are in no way associated or affiliated with Gaming Trunk.