Some horse's need a softer material in their mouth than metal. BR's Apple Mouth bits can be a suitable option. This double jointed loose ring snaffle bit has stainless steel rings with an plastic apple mouthpiece that offers an apple taste to the horse.
Rings measure 55 mm for 11.5 cm and 65 mm for 12.5 cm, 13.5 cm and 14.5 cm.
Mouthpiece thickness 18 mm.