Massey 50-C air filters

[Garrett66]

Hi all. new to the world of diesel motors and old tractors. Got this 1966 Massey Ferguson 50-C from a great old guy who loved restoring old tractors but couldn’t lift the tools anymore due to back issues. This old girl was his work horse, not his beauty. Not pretty but ran great after bumping with a little ether. He had #s on the oil and fuel filters but not the air and hydraulic filters. when I look up the air filters the measurements don’t match what is in the tractor. The air filters measurements are
outer=12” long x 5.25“ outside diameter x 3” inside.
inner= 11” x 3”. Any help is appreciated. Just reading the threads on here have already help me tremendously.