The Culligan D-40A Replacement Filter is a 0.5 micron carbon block filter which offers Level 4 Premium Filtration. The D-40 has been tested and certified by NSF/ANSI Standard 42/53. This filter effectively reduces Bad Taste & Odor, Chlorine, Sediment, Lead, Asbestos, Cysts, Mercury and much more.

• 0.5 Micron extra-fine sediment water filter
• Reduces extra-fine dirt, sand, sediment, silt, rust particles and scale particles
• Removes 99.95% of Cryptosporidium and Giardia cysts
• Reduces Lindane and Atrazine (a pesticide and herbicide), lead, mercury, bad taste and odor, sediment, and asbestos
• Fits in under sink water filter systems
• Easy to install
• Dimensions: 9.75″ x 2.4″ x 2.4″
• Filter life is up to 6 months or 600 gallons
• Tested and certified by NSF International