Avon Protection - My filter has ABEK P written on it, what does this mean? Each letter of ABEK refers to certain groups of gases that the filter protects against (see image
BartelsRieger A2B2E2K2 Gas Filter | Premium Screw Filter | Rd40 | ABEK Multi-Domain Filter for Protection against Solvents, Ammonia, Chlorine : Amazon.com.be: Tools & Home Improvement