the smt dummy helps dogs learn a softer, gentler grip with its “s-grip” design that locks their teeth into the curves of the dummy, reducing the chance of getting “hard mouthed.” made from soft, pliable plastic to mimic a real bird’s body, it features an adjustable pressure valve so handlers can make it softer or firmer for customized training. versatile, durable, and long-lasting, it’s perfect for land or water training, and floats in water. small: 10.75" | large: 11.25".