4" TYPE B GAS VENT HOLD-DOWN PLATE

4" TYPE B GAS VENT HOLD-DOWN PLATE, TYPE BW GAS VENT WHEN INSTALLED ON WALL FURNACE USING 408 PWS HOLD DOWN PLATE AND 40 CP PLATE SPACERS AND 40 FS FIRESTOP SPACERS, TYPE B GAS VENT WHEN INSTALLED WITH 1" MINIMUM CLEARANCE TO COMBUSTIBLES OR WHEN INSTALLED BETWEEN 2 X 4 WALL STUDS USING 40 FS FIRESTOP SPACERS, DIMS:1 1/2"H X 3 "W X 9 5/8"L, WEIGHT:2 OZ, BULK, MADE IN MEXICO.