20" X 30" AIR DISTRIBUTION PLENUM BOX INPUT: 8-1/2"X11-1/2" (20)2" CUTOUTS

20" X 30" AIR DISTRIBUTION PLENUM BOX (20)2" CUTOUTS, RATING:R8, 2-2.5 TON,INPUT:8-1/2" X 11-1/2", OUTPUT:(20)2"CUTOUTS,INCLUDES:PLASTIC COLLARS,METAL COLLAR, OVERALL DIMS:13-1/2"H X 20-3/8"W X 30-1/8"D, WEIGHT:19LBS 10OZ, MFG BOX, ORIGIN:UNKNOWN, ADD PART # 301-019-R8