[b]Carter 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! Experience the benefits of Fager's Sweet gold bits: Introducing Fager's latest innovation: the Sweet GoldBit. Crafted to address common challenges faced by riders with horses unsteady in the contact, prone to dropping the bit, or lacking in their instinct to seek out contact, this bit offers a solution for enhanced connection and performance.