Dokken Dog Supply Rubber Knobby Dummy - This dummy from Dokken Dog Supply is extra knobby for greater grip and realistic feel. It comes with an attached throw rope and is injectable for a more realistic hunt in and out of water. There is an added air valve to adjust buoyancy and weight. Available in all white and a black and white model. 10 inches longAttached throw ropeInjectable for a realistic hunt in and out of waterAdded air valve to adjust weightAvailable in an all-white and black/white model