The Weller 0058735895 Adhesives Fume Filter is designed for use with for the WFE2S, WFE2ES, and Zero Smog 4V Fume Extractor Systems. The carton filter consists of a H13 HEPA filter and a wide band gas filter. The wide band gas filter is composed of 50% active carbon and 50% Chemisorb. The H13 HEPA filter is capable of removing 99.95% of particles up to 0.3 microns.