Wall reference system with 10 Sterifold white-framed display pockets. Thanks to exclusive technology, the silver ions included in Tarifolds WA221 display pockets deter microbial growth by eliminating micro-organisms. Sterifold display pockets will release antimicrobial silver ions every time bacteria, mold, or fungi appears on the surface of the pockets. Silver ions will do the following to the microorganism: attack the cell wall; interrupt metabolism; prevent reproduction. For optimal protection, we recommend the Sterifold display pockets be replaced every 2 years. Especially suitable for environments at high risk of microbial proliferation, including restaurants, medical, and pharmaceutical environments. 10 year product warranty.. This item has been restricted from sale in the following state (s): ['No']