This is the TM 11 mouthpiece on a 7” shank with a 1 5/8” purchase. This mouthpiece offers a great feel. Because the port has 1.5” of tongue relief a horse is very comfortable with it in the box and the field, but when you need to stop them it really makes them respond. It keeps the front end held up nicely and promotes a correct stop. Great calf horse and breakaway bit!