This is a basic jointed mouth snaffle with loose rings to allow more movement in the horse's mouth. The mouthpiece thickness is 13mm. Cheek height is 40mm (4.5"), 65mm (5" - 6"). Shires Jointed Mouth Loose Ring Snaffle Bit has been created in Stainless Steel which is the most common material for bits. It is durable, easy to clean, tasteless, and does not rust. This jointed bit has loose rings which is ideal if your horse likes to brace against your hand as it allows more movement in the mouth when a contact is taken up. Available in 4.5", 5", 5.5", or 6".