Central Pneumatic Air Intake Filter

Central Pneumatic 40400 air compressor intake filter. Harbor Freight doesn't have the replacement part. I bought air filters on Amazon that fit.

All air filters online were not matching the compressor head thread (M20-1.5). A bit of sanding may be required to screw depending of your printer resolution.

Air filters (EXAMPLE):
https://www.amazon.com/Compressor-Silencer-Filter-Intake-Muffler/dp/B081VL46TT/

Use a high temperature material since the head will heat a lot.
High resolution recommended for proper thread.