INSTACHEW presents the PETKIT Cat Scratch and Play Mat
The balls are meant for the 4 in 1 Cat Scratcher. You can also use them separately so your cats can have some extra fun. There are two balls. One orange ball that contains a bell and two green balls that contain catnip. The Scratcher bed comes with a base unit that can hold 2 balls and scratchboard. The replacement board is only for the Petkit 4 in 1 Cat Scratcher. The board is 100% non-toxic, extra-thick cardboard.