[b]Gustav 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! Registered Design NOTE: Gustav can be used in two ways: Either with tongue relief or with bar relief. For tongue relief - If you would describe your horse as the following: * Inconsistent in the contact, needs to lay more on the bit. * Pulls the reins down/forward when you take up the reins. * Sensitive tongue. * Attempts to put their tongue over the bit/plays with the tongue. * Fussy mouthed. For bar relief- Turn the bit upside down. If you would describe your horse as the following: * Inconsistent in the contact, needs to lay mor