This Double-Jointed Loose Ring Happy Mouth Bit has a mouth covered in soft yet strong apple-scented plastic. Stainless steel rings.
The Special Dressage Weymouth Curb Bit by Herm Sprenger is designed with a higher port that is angled forward 30º and broader in the middle to allow space for the tongue. Its Aurigan® mouthpiece encourages salivation, resulting in a soft mouth and maximum bit acceptance.
The KK Ultra D-Ring Bit by Herm Sprenger features a 15mm Aurigan® mouth with a center link that's shortened and rotated 45 degrees.