This is stainless steel filter media for Leybold RST Refillable Traps, used for corrosive applications. Fits RST 16KF, RST 25KF, and RST 40KF Refillable Traps.
(RST Trap not included but sold on this website). For complete specifications and advantages to the user, download data sheet see below. (AVAILABLE DOWNLOADS:)

Leybold Stainless Steel Filter Media for RST Refillable Traps:
Fits Trap Models: Leybold RST 16KF, RST 25KF, RST 40KF
Weight: 1 lb