Catit Senses 2.0 Cardboard Backbone (Set of 8) Set of 8 cardboard discs, for use with the Catit Senses 2.0 Scratcher (#42468) Flip, rotate and restack the cardboard discs to create different scratching set-ups Ergonomical backbone shape, free of excess bulk to help minimize waste Activate your cats senses with the new Senses 2.0! This product activates TOUCH