Stainless Steel Imported Covered with a soft, flexible yet extremely durable apple-scented plastic which encourages acceptance and softness The mullen mouthpiece has an inner core of twisted wire for more flexibility Stainless steel rings in the traditional shape offer some slight lateral guidance Help prevent the bit from sliding sideways in the horse's mouth From Dover Saddlery: The leader in equestrian products for over 40 years offering the best quality horse and rider products throughout the US HAPPY MTH Shaped Mullen Pro King Dee, Color: Stainless Steel, Size: 5.75 (467246SS-575)