4 Pack Culligan D-40A Under Sink Water Filter Replacement Cartridges 0.5 Micron Culligan D-40A Level 4 drinking water replacement cartridges designed for under-sink filtration. These 0.5-micron carbon block filters effectively reduce lead, aesthetic chlorine, cysts, mercury, asbestos, and sediment to provide cleaner, better-tasting water. Each filter features a 6-month or 600-gallon life span and is easy to install. Compatible with Culligan US-600A systems and most GE, Whirlpool, Omni, Dupont, and 3M Filtrete under-sink filtration systems. This lot includes four individually shrink-wrapped cartridges. Measurements: • Height: 9.75" • Diameter: 2.375" #CulliganD -40A4pack #CulliganD40Areplacementfilters #D -40A0.5micron #Culliganundersinkwaterfilter #CulliganUS -600Afilter