KX Matrikx ® PB1-10BB-Matrikx# 06-450-10-Matrikx.5 Micron Big Blue Extruded Carbon Block Water Filter. Lead, Cyst, Giardia and Crytosporidim Reduction. 9 3/4" long X 4 1/2" diameter . 9 per case, sold individually. Order a case and save even more.