Ideal for a horse with a firm grasp of the basics paired with an advanced rider, the Myler MBB Black Flat Shank with Sweet Iron Low Port Comfort Snaffle (MB 04, Level 2) has a black shank with stainless steel dot details and a sweet iron mouthpiece. Mouthpiece has a slight port to give some relief to your horse's tongue and center barrel will roll on the tongue to give correctional pressure.
Details
\n
The Basics: Black shank will fade to antique brown over time; sweet iron will oxidize naturally over time, is harmless to horses, and its sweet taste encourages salivation.
\nBenefits of a Flat Shank: Flat shanks are curb bits that require less contact than other bits. They are well-suited for advanced, dexterous riders who use soft hands with horses who respond well to light bit pressure. 
\nLevel Up: Myler's unique "level" system means there's a bit for your horse no matter their training. Level 2 mouthpieces generally give a more relief on the tongue and the curved mouthpiece collapses into a "U" shape to avoid pinching of the lips and bars. Ideal for a horse trained on the basics and working toward more bit freedom.
\n
Independent Side Movement: Entire shank moves independently from the mouthpiece which means more control and clearer communication between you and your horse.