These are some of the BEST trachea on the market. A full 6" and nice and thick. Easy to stuff and freeze or just enjoy plain. Trachea is a great source of collagen, glucosamine and chondroitin. Also good for cleaning teeth and you can stuff the trachea as you would a KONG for extra enrichment. Our trachea is made from one ingredient and are grain-free. Trachea, (also called a Moo tube) is high value treat chew that contributes to overall joint health. Sourced from free range USA and South American cows raised without the use of hormones or antibiotics.