Developing a great retriever requires a lot of gear. Training bumpers are one of the most important tools. Whether you are throwing marks, running blinds or teaching drills a quality bumper in large quantities is a must. It is perfect for mark training! 10 inch floating throw rope is included. Leak-proof valveless design for long life, Six flat sides offer dogs easier grip + hold, Firmer feel helps reduce chomping tendency, VGrip promote soft mouth with superior hold.