Can Filter Original SeriesEach Original Can Filter uses the most conceptually sound, granular carbon, packed bed design to deliver the best performing carbon filter on the market. Even with the industrys thickest carbon bed, at 2. 5 in, the Can Original provides for some of the lowest pressure drops, even on smaller size filters. This hefty granular carbon bed effectively makes the Original filter the biggest sponge for VOC removal capable of holding massive amounts of