PRO FILTER AIR FILTER AFR-4001-00. The vendor part number is AFR-4001-00. Read title carefully to know what you are getting. Here is the catalog descrion NOT the title?

Ready-To-Use

When you get ready to change your filter, change it to a PRO FILTER READY-TO-USE. A new perfectly oiled Ready To Use air filter that provides maximum airflow and increased horsepower.

• Dual Stage Open Cell Foam Matrix
• Plush 13MM Sealing Foam
• Pre-Oiled with MAXIMA FFT™
• Complete kit includes Disposable Gloves

PREMIUM
PRO FILTER Premium Air Filter is made of chemical resistant, high quality polyester based foam.  Dual-stage design allows for superior filtration by eliminating the passage of fine dust and dirt, while helping to prevent air flow blockage.  Special reticulation process offers unsurpassed air- flow and filtration. Industrial strength, resin bonded seams increase the integrity of the air filters wash after wash.  Packaged individually in a re-sealable bag.

• Chemical resistant, polyester based foam
• Dual stage, reticulated foam
• High strength industrial seams
• Reusable
• Rubber grommet