This product is a set of 10 white color Pyrex glass blowing tubes, with a length of 4 inches and an outer diameter of 12mm and an inner diameter of 8mm. The tubes are not handmade and are manufactured in China. These glass blowing tubes are essential supplies for glass artists and crafters who work with glass blowing techniques to create unique and intricate glass sculptures and art pieces. The high-quality Pyrex material ensures durability and flexibility during the glass blowing process, allowing for precision and creativity in the final artwork.