Type L; model VP thru the wall 4" pellet stove pipe installation kit. Inner wall stainless steel, outer wall paintable galvanized pipe. Rolled over Male end eliminates sharp edges. Internal spacing bead assures uniform insulating air space between pipe walls. Gasketed joint design. Kit contains 1 horizontal cap, (1) 90 deg. elbow, 1 wall bracket, (5) 1' pipe lengths, 1 tee with cleanout, 1 wall thimble, 1 tee support, (1) 3" to 4" increaser, (1) 4" pipe connector, and (1) 3" pipe connector.