[b]Matilda Titanium 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! [i]Fager Matilda is suitable if you would describe your horse as the following;[/i] * Can be worried in the mouth but get too stiff on straight bits * Sensitive for pressure, regularly avoiding the contact. * Struggles to connect with the contact. * Can overreact when you take the reins * Reluctant to soften down into the bit.