Marcel Toulouse Sanft Curved Mouth Hunter D-BitA simple curve makes the bit lay flatter on the bars of the mouth. The more open the tongue area the less pressure for greater comfort. Available in Sizes 4 3 4", 5", 5 1 4", 5 1 2", 5 3 4" with a mid thickness 16 mm thick mouthpiece. From Ponies to Derby's, our Sanft "Big D" ring snaffle is the classic look in the Hunter Ring.