[b]Marcus Sweet iron Mouthpiece goes with the Otto combination bit. When you order a mouthpiece for your combination bit, please select a size that's 1cm larger. [u]Please understand:[/u] We make the mouthpieces just for you once you order. So, you can't return or exchange them. We create them from our standard loose ring bits to fit your needs.[/b] This lets us give you a variety of mouthpiece options and sizes for your custom bit! [b]A Registered Design[/b] [i]Fager Marcus is recommended if you would describe your horse as the following;[/i] * Pulls against the contact yet reacts to increased pressure. * Unsteady in the contact. * Tosses their head and drops it below the contact. * Resistant to acceptance onto the bit. * Doesn't instinctively seek out the contact.