This product is a set of 10 white color Pyrex glass blowing tubes, with each tube being 4 inches long and having an outer diameter of 12mm and an inner diameter of 8mm. These tubes are ideal for glass blowing, a craft that involves shaping and molding glass into intricate and artistic pieces. Made in China, these tubes are perfect for artists and hobbyists looking to create unique and beautiful glass sculptures. Despite not being handmade, these tubes offer high quality and durability for various glass blowing projects.