CamPure 154 is a blend of CamPure 15 and 4mm extruded coal carbon. CamPure 15 is a high-quality chemical adsorbent based on a combination of activated alumina and activated carbon powders, co-formed with a proprietary impregnation system. Camfil's 4mm extruded coal carbon is a very high-quality grade of activated carbon that has an adsorptive capacity towards a very wide range of volatile organic gases and odours.