Product Description 3" x 12", 3VP-12, Pellet Stove Pipe, Model VP. Type L vent tested and listed to UL-641 standard, as well as the UL-103 standard. Engineered for pellet and corn burning stoves. Coupling joint connects in seconds to secure efficiently. Inner wall is constructed from 304 stainless steel and the outer wall is paintable galvanized. 3" inch clearance to combustibles. From the Manufacturer 3" x 12", 3VP-12, Pellet Stove Pipe, Model VP. Type L vent tested, and listed to UL-641 standard, as well as the UL-103 standard. Engineered for pellet and corn burning stoves. Coupling joint connects in seconds to secure efficiently. Inner wall is constructed from 304 stainless steel, and the outer wall is paintable galvanized. 3" inch clearance to combustibles.