KX Matrikx +1 01-250-125-975 Carbon Block Filter (9-3/4" x 2-7/8") New - Retail 30-Day Warranty KX Matrikx 01-250-125-975 KX Matrikx +1 01-250-125-975 Carbon Block Filter (9-3/4&quot; x 2-7/8&quot;)