These Firefly Frenzy refills are Da-Bird cat Toy compatible - Fits Flying Frenzy, Da Bird, Cat Catcher and Hyendry Baton Cat Toy wands/rods/poles (not included). *Feather toy activates your cat"s hunting instinct *Cats go crazy with this refill! *Even lazy and fat cats cannot resist it *You need to hide it away while not in use!! Part of the Frenzy refill "Bug" Range, it attaches to the end of the Frenzy wand imitating a colourful fly/bug. The Frenzy Firefly refill is an Realistic "bug" size approximately 2 inch long marabou feather body plus 2 to 3 inche feather tails. THere are 6 Firefly designs in all. You will receive one at random. The Frenzy Firefly is made with the feathers securely fixed to a plastic tube running through the middle (No sharp metal bar!) The connection to the wand toy is via a braided strong cord hook on the front fixed to the plastic tubing. Various designs, colors & tails. Simply clip on to play! This is the refill/attachment only that fits on to the Frenzy or Da bird rod cat toys (rods available separately) Every cat has an inbuilt natural hunt instinct, ( it"s what they are made to do! ) and need to hunt to lead a happy fulfilled life. Frenzy make natural hunt toys. As with ALL cat toys, please supervise play and put away when not in use to preserve the refill. To complete a cat"s natural hunt, catch, kill, eat cycle, use the Frenzy wand and refills as hunt exercise toys and some feathers or Use the Frenzy reward toy for the kill instinct and cat treats for afterwards to complete the cycle.