This Double-Jointed 2-Ring Elevator Bit from Happy Mouth has loose rings and a mouth covered in soft yet strong apple-scented plastic.
This Double-Jointed Loose Ring Happy Mouth Bit has a mouth covered in soft yet strong apple-scented plastic. Stainless steel rings.
The Herm Sprenger Dynamic RS Sensogan® D-Ring Snaffle Bit has an ergonomically shaped 14mm Sensogan mouthpiece and 75mm stainless steel rings.
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.