Sprenger 16mm Hard Carbon Mullen Mouth Snaffle With Stainless Steel Eggbutt Horse Bit stable The Stubbs Classic Horse Shoe Breeches The Stubbs Classic Horse Shoe Door Bolt combines authentic equestrian style with robust functionality and a sustainably sourced natural latex rubber sole which uses 40% recycled materials Eggbutt Mullen Mouth 16 mm thickness with oval stainless steel rings in a hard carbon mouth piecerigid mouthpiece with smooth surfaceexerts steady and even pressure onto the whole tongue widthallows direct pressure transmission on the tongue and lower jaw due to the fixed mouthpiecelies steady in the horse's mouth gentle on the corners of the mouth