NIB New in Box.  NOS New Old Stock.  The plastic cover shell part of the package is intact and sealed, protecting the filters.  As this product is new old stock, over the years the paper cardboard backing shows signs of gentle handling wear and minor deformation.

The AO Safety Respirator Models (see later) and Replacement Cartridges were discontinued perhaps fifteen years ago, and as such are becoming rare and hard to find.  The cartridges for sale here, for example, have a label with the manufacture date of June 2008, see photo.

The replacement cartridges for sale were designed to be used with AO Safety Respirators Models 95050 and 95090 and 95091.

Item's History:  This package of filters was purchased around 2010 as a backup for the 95601 filters in my AO Safety Quick-Latch Pro Respirator 95090.  Over time, the respirator's nose bridge area began to wear and cause the seal to leak (see photos of the respirator and nose bridge area).  

I primarily used the respirator for woodworking (dust from table saw) and the leak was tolerable in the beginning.  Occasionally, I used Rustoluem rattle-can spray paint and eventually I replaced the AO respirator for a better painting vapor filter respirator.  

Eventually, I just stopped using the AO respirator.  Maybe someone else could use the respirator as-is or for parts and I'll list it on eBay.  When the respirator began to wear, I looked online but could not find a new replacement which was too bad as I really liked the AO product, especially the Quick-Latch feature.

The photos are of the actual item for sale.  Please ask if you would like additional information.

The following is the AI description provided by eBay:  The AO Safety Model 95061 is a set of two replacement filters for masks and respirators. The filters are new old stock (NOS) and come in their original packaging (NIB). They are compatible with models 95050, 95090, and 95091. The brand is AO Safety and the filters were manufactured in the United States.