Easy to Use and Easy to Clean Helps Deflect the Wind from the Firebox Works with the Front Grease and Rear Grease Blackstone Griddle Four (4) Pieces Two {2} Short Side Pieces and Two {2} Long Back Pieces. Long Pieces: 14.25”x 3”x .43” Short Pieces: 12.8”x 3”x .43 Note: This item is not compatible with 28" Griddle Units that come with a hood. This includes, but is not limited to, models 1845, 1858, and 1855.