The J60004 Jones Stephens 4" Cast Iron Philadelphia Vent Box is a durable and reliable plumbing fixture designed for use in homes and other buildings. Made in India, this unit is a single cast iron vent box that measures 4 inches in size. It is a high-quality product from a trusted brand, Jones Stephens, ensuring that it will efficiently and effectively vent plumbing systems. Additionally, it is important to note that this product may have specific California Prop 65 warnings related to its materials, which can be found on the manufacturer's website. New Open Box.