The Ninja Woodfire Large Grease Tray Liners keep grease and drippings contained in one convenient drip pan, making for a hassle-free cleanup. The 5.91'' x 8.66'' x 1.97'' disposable grease trays are made of durable aluminum foil and are leak free. Each pack includes 10 grease trays that are compatible with the OG800 and 900 series.