Paramount 004-152-4517-00 Fine Mesh Canister Bag
This is a replacement Fine Mesh Bag for the Paramount Debris Canister. Can be used in their In-Deck & Equipment-Side Canister. It is used with the basket and includes instructions on how to install it on the basket.
It is a 600 micron bag that is designed to catch dirt & small debris that can clog the pump. Allows DE to be fed through if your pool has a DE filter.