This company has expanded its OdorGuard Plus Product Line to include 1", 2" and 4" Pleated Filters with adsorbent loadings of 125, 250, and 375 grams per square foot of filter area, respectively. The "Plus" pleats offer equal volumes of 60% activity activated carbon and activated alumina impregnated with 5% potassium permanganate. This blend of adsorbents will remove a wide range of odors, VOCs and light gases, including ammonia, formaldehyde, hydrogen sulfide and sulfur dioxide. Since no adhesives are used, all OdorGuard pleats offer low resistance and maximum adsorption properties. They are extremely clean, will not shed or dust in the application and have UL class 2 approval. They are available in standard and special sizes. A 12" deep "Rigid Cell" is currently under development.