A-AR79942 Filter, Element, Dry Air Cleaner, Safety ElementOne New Aftermarket Replacement Dry Air Cleaner Safety (Secondary) Filter Element Fits John Deere Tractors, Cotton Strippers, and Cotton Pickers This dry air cleaner safety element serves as the inner secondary filter in Fits John Deere two stage dry air cleaner assemblies. It provides a final layer of engine protection during primary filter service, preventing unfiltered air from reaching the engine while the outer primary element is being changed.