Kaytee CritterTrail Playpen with Mat Includes a large 24-inch wide and 28-inch long protective mat to guard against messes Comes with 12 connectable brightly colored 5.5" long and 9" high wire panels Includes optional passageway connector and secure locking cap for connecting to any CritterTrail home The CritterTrail Playpen quickly and easily breaks down for compact storage For hamsters, gerbils or mice