This Myler bit has a narrow low ported barrel. It is the mildest bit in the 2-3 Myler level. It does not rotate on the tongue and offers significant tongue relief. It is perfect for horses with a self controlled character. The 5 inch mouthpiece is made of sweet iron with a copper inlay. This mouthpiece will naturally oxidize, or rust. Harmless to horses, it has a sweet taste and promotes salivation. 5inch HBT shanks. Myler Level 2-3 mouthpiece.