With 15 years experience specializing in activated carbon odor control, Can-Filters designs and builds only the highest quality Activated Carbon air filter, using only Virgin Activated Carbon specially formulated to meet your job criteria. Can-Filters provide one of Nature's BEST odor control materials, ACTIVATED CARBON. The CKV-4 (carbon type) is specially developed for this purpose. Choice of Carbon type and activation process affects the Carbon's ability to perform well for a given application. Controlled grain size and a large surface area give full rated airflow and more than 99% odor removal. Carbon bed thickness is 2.5" - More carbon means more absorption! Can-Filters packed bed design means no settling and no preferential channels for consistent performance and long life. High quality Pre-Filter