New with boxes. These are leftover from the system I used to have in my previous residence. I’m using a different system now, so have no need for these. The Pentair EP-20 BB Carbon Block 5 Micron 20" Big Blue is a high-quality water filter designed for wholehouse filtration. Made by the trusted brand Pentair, this carbon filter is suitable for removing chlorine taste and odor from your water supply. The 5 micron filtration method ensures a clean and refreshing drinking experience, while the blue colour adds a touch of style to your plumbing system. Compatible with any 20 inch Big Blue filter model, this product is a reliable and efficient choice for maintaining your water quality.