This Double-Jointed 2-Ring Elevator Bit from Happy Mouth has loose rings and a mouth covered in soft yet strong apple-scented plastic.
The Ovation® Elite Center Oval 2-Ring Elevator Bit has a shorter, slightly rotated center oval link that rests entirely on the tongue for precise rein communication. This stainless steel elevator bit has an 18mm mouth.
The Herm Sprenger Dynamic RS Sensogan® D-Ring Bit with Smaller Rings has an ergonomically curved 14mm Sensogan mouthpiece with an angled center joint. 65mm stainless steel rings.