Starfinder Flip-Tiles: City Starter Set: - Rules of Play says:

Stage the scene for epic science fantasy battles with the Starfinder Flip-Tiles: City Starter Set! This boxed collection of 42 durable, double-sided full-color 6 x 6-inch map tiles provides tons of options for futuristic urban encounters, from foot chases through narrow alleys to searching for suspects in cramped cubicle apartments! These exciting new tiles bring countless combinations to your game table! Suitable for experienced GMs and novices alike, this product fits perfectly into any Game Master's arsenal. Wet, dry, and permanent markers erase from the tiles! These double-sided space station tiles come in convenient packaging for easy storage.