The Stealth METRx Tubes set is a high-quality set of bicycle tubes made from titanium, specifically designed for 20 X 6-9 inch wheels. Manufactured in the United States, these tubes are durable and reliable for cycling enthusiasts looking for a durable and lightweight option for their bikes. Made by a reputable brand known for quality products in the cycling industry, this set of tubes is a great choice for those seeking performance and reliability on the road or trail.