4" STRAIGHT 12 N-VENT PIPE; MAX. FLUE GAS TEMP. 4" & 5" 480 DEG. F/ 249 DEG. C, 4" 330 DEG. F / 166 DEG. C; ENCLOSED HORIZONTAL TOP: 12" SIDES: 8" BOTTOM: 4" , VERTICAL 4" ; UNENCLOSED 4" & 5" HORIZONTAL 2" , VERTICAL 2"; UNENCLOSED 4" HORIZONTAL 1", VERTICAL 1"; DIMS: 14" X 4" DIA; WEIGHT:10oz; IN BOX, MADE IN JAPAN