The Blodgett 09321 3-Piece Insulated Deflector Assembly is essential for improving oven performance and efficiency of models 901, 911, 916, 931, 951, 961, 966, 981 and more. The assembly contains a center piece 20" x 28", flanked by two side deflectors 11-3/4" wide without lip and 12-3/4" wide with lip, both 28-3/8" long. https://partsfe.com/deflector-assy-3-pc-for-blodgett-part-9321