4 Pack, The CW25-BBS polypropylene wound heavy duty filtration cartridge works in Culligan model HD-950A whole house filtration systems Perfect for residential homes, helps protect appliances and pluming from sediment and scale Features a flow rate of 8 GPM and filter life of 5 months/20,000 gallons depending on usage and water conditions Reduces: sediment, rust, scale, dirt, coarse sand and sand. Imported The HD-950A housing has been tested and certified by WQA against NSF/ANSI Standard 42 for materials saferty and structural integrity
