The Litterboy Wool Mouse refills fit the Popular Wand / Rod Toys. Cats go crazy with this refill! ,You will need to hide it away while not in use!! The Litterboy Wool refill is made of Wool and leather. Made with the hair securely fixed to a Leather core running through the middle (No sharp metal bar like other brands) The connection to the wand toy is via a braided strong cord loop on the front securely fixed to the leather core. Simply clip on to play! (rods available separately and required to use attachment). Every cat has an inbuilt natural hunt instinct and need to hunt to lead a happy fulfilled life. Cats love the natural hunt toys. As with ALL cat toys, please supervise play and put away when not in use. Available in Single, 3 Pack or 5 Pack - Mice Colors will vary due to availability of Wool.