The Expanse RPG GM Kit - Rules of Play says:

Being a GM for such a rich setting is a big job, so The Expanse Game Master’s Kit is here to help. It provides a sturdy, full-color GM screen with essential tables and references for game-play on one side and evocative artwork on the other. It also includes 4 quick reference cards that put the stunts and actions at your fingertips, a combat tracker that you can write on with wet or dry erase markers, a set of pre-generated Player Characters, and a complete adventure to launch your crew right into the exciting universe of The Expanse!