The Metal-Fab 6" B-Vent 6MPT Wall Thimble is designed for safe and secure installation of Type B gas vent systems through walls. Made from high-quality materials, this durable component helps maintain proper ventilation for gas appliances, ensuring both efficiency and safety. Its 5-inch diameter and reliable construction make it suitable for residential and commercial applications, meeting UL 441 and NFPA 54/211 standards for dependable performance.