Stainless steel tips; 0 degree and 15 degree for 6 " spin jet duct cleaner. Great to have as extra parts. Restaurant Kitchen Exhaust Hood Cleanings starts at $500-$650 for an average cleaning and goes up as the hood gets longer or more complex with the vertical and horizontal ducts and fans it has and what type of volume of cooking, they do. According to NFPA Code 96, the exhaust hood system needs to be inspected and/or cleaned either monthly, quarterly, twice a year or once a year. It all depends on the type of cooking, the type of restaurant and the volume of grease it produces.