4" x VERT RAIN CAP PELLET VENT
4" PRAIRIE W/4" EXH,3" INTAKE
4" PRAIRIE BLK 4"EXH 3" INTAKE
4" x WALL STRAP PELLET VENT
4" x WALL THIMBLE PELLET VENT
4" x WALL THIMBLE W/AIR PV
4" x 6" INCREASER PELLET VENT
4" x 8" INCREASER PELLET VENT