The Racing Dee Bit with Soft Rubber Mullen Mouth is a gentle and soft bit designed for horses with damaged or sensitive mouths. It features an 18mm soft rubber-covered Mullen mouthpiece reinforced with steel through the center for durability and comfort. The bit has stainless steel Dee rings, offering a more inconspicuous cheek profile compared to other bits.

Its soft rubber mouth provides a mild action, making it suitable for racehorses that need a tender bit option without applying excessive pressure on the horse's mouth. The bit size is typically around 5 inches (12.5 cm), which is a common cob size for racing bits.