This is just the 10" Housing found on the 10" Filter Kit. It has 1/2" FPT on both the "in" and "out" of the housing. This can be "ganged" on to the FIL40 with the help of a 1/2" stainless nipple, H610.,For Filter Cartridges, see our line of BevBrite Filters.,Please Note: This housing is for 10" filter cartridges.  Many cartridge filters are 9.785" long, and will allow some bypass if used with this housing.