Professional's Choice Bob Avila Signature Shank Medium Copper Port Bit Mouthpiece:Medium Copper Port Good for working with older

Good for working with older

and padded

faster feel than a polygrass

as the bottom strand finds its way to the ground with a wide-open loop

The GT4 is also much more durable than any conventional three-strand

Professional's Choice Bob Avila Signature Shank Medium Copper Port Bit Mouthpiece:Medium Copper Port Good for working with olderThis bit features a solid mouthpiece that works off bar and palate pressure. The mouthpiece is thicker than most, and the port offers a great deal of tongue relief. Good for working with older, more mature horses. Copper mouthpiece keeps the horse's mouth moist. This bit requires light contact. Port: 1 1 2", Mouth: 5", Cheek: 7 1 4"