Field Controls 46268401 CAS-2B Air Boot Kit For Use With Beckett AFG or AF Oil Burners Field Controls 46268401 CAS-2B Air Boot Kit For Use With Beckett AFG or AF Oil Burners What's Included 1- Air Boot 1- Set of Gaskets 1- 4" VRV 1- 4" IAH Hood 1- Burner Coupling Set 2- Mounting Bolts 1- Flow Restrictor Pan This product is designed for use on the following burners, for the purpose of routing combustion air directly to the burner, with the added safety feature of the vacuum relief valve. NOTE: For burner inputs up to 2.0 GPH at 100 PSI input pressure or equivalent.. This product brings combustion air only to the burner; must have adequate venting air in accordance with NFPA-31. Same As Beckett 51747