Trust Sweet Iron 2½ Ring Medium Port.

Sweet Iron

Sweet Iron bits are made of blue steel and release a sweet-tasting surface rust through contact with saliva, which stimulates the horse's saliva production in a natural way. This sweet surface rust will cause the horse to foam more and accept the bit better.
When a Sweet Iron bit is temporarily not used, an orange-brown rust layer can form on the mouthpiece. This can be easily removed by wiping the bit with a damp cloth.

2½ & 3 Ring Bit:

A 2½ & 3 Ring Snaffle is also called a Pessoa bit and can be recognized by the extra rings on top and at the bottom of the regular bit rings.
The top ring is used to attach the cheekpiece and the bottom ring the rein.
When using the rein, the top ring will tilt forward and create leverage.
The strength of the impact is determined by the type of mouthpiece, material and number of rings.
A 2½ ring snaffle is therefore less effective than a 3 ring snaffle.

Straight mouthpiece:

A straight mouthpiece consists of 1 piece and gives pressure on the tongue, layers and lips.
The shape and thickness of the mouthpiece determine where the pressure will be in the mouth.
A straight mouthpiece with a tongue port gives more pressure on the layers and keeps the tongue free.
The straighter and thicker the mouthpiece, the more pressure on the tongue.