Thru-The-Wall, 3", Type L Pellet Kit, Vent System For Pellet Stove Applications, Includes One 3" Horizontal Cap, One 3" 90 Degree Elbow, One 3" Wall Bracket, Five 3" x 1' Pipe Lengths, One 3" Tee With Cleanout, One 3" Wall Thimble, & One 3" Pipe Connector.