SNAP-RING filter bags are used in filtration systems worldwide and have been for more than 30 years. They are designed to be an affordable and reliable filter option, made under ISO 9001 standards. This 100 micron bag is a size 03, description N-100-P03S-50. This particular bag model is sewn together using Nylon felt. It gets its name from the solid carbon steel ring sewn into the top. The ring, available in six different materials, forms a seal between the bag and housing when installed. Eaton Part Number: F3AB00630 comes in box quantities of 50.