<b>Why Carbon is the most important part of your Air Filter?</b> <P>Carbon quality grade and the thickness of the carbon bed are the 2 key elements which determine performance of any Carbon Filter. Unlike many of our competitors who use large carbon pellets/rods of lower grade coal, TerraBloom Carbon Filters are made with RC-48 and RC-412 Grade Australian Virgin Carbon. This top quality carbon is granulated into the smallest pieces which allow for tighter packing inside the filter with less air pockets between the granules all leading to a better filtration performance. Unlike many economy grade filters, which only have the carbon bed that is 38mm thick, all TerraBloom Carbon Filters have carbon beds which are 46mm thick. This is 20% more carbon which contributes to longer life span and better odor elimination properties of our filters. </P> <p><b>TerraBloom's 8 Inch x 24 Inch Carbon Filter Additional Info:</b></p> <p><UL> <li>Includes 2 Machine Washable Pre-Filters (Black and White). Please use 1 pre-filter at a time and wash them after each grow cycle. </li> <li>Machine packed 46mm thick carbon bed for the top level performance. No more reeking smell at the end of your flower cycle. </li> <li>Pre-installed aluminum flange and base for easier installation</li> <li>Better quality, sleeker design and outstanding performance</li> <li>90-Day Warranty for any manufacturing defects</li> </UL></p> <p><b>TerraBloom's Commitment to Customers</b></p> <P>At TerraBloom we are focused on providing high-quality household air ventilation and indoor garden products at affordable prices. Our ventilation products are designed and tested for performance in a wide range of household and horticultural applications. With years of experience behind our belts, we understand the importance of proper airflow and strive to enable our customers to achieve their ventilation goals in the most efficient way possible.</P>