Cim-Tek 50032 400 Series Filter Adaptor 50032 Material: Aluminum adaptor Used on: 400, 450, & 475 series Inlet/Outlet ports: 1" NPT Nose outside thread: 1 1/2" 16 UNF Also available in Nickel Plated for 70039 400BHA High Alocol Filter Price: $46.97