These 2 filters were installed brand new, but the main RO unit was defective and our return window had passed. Effectively they are brand new. I will be shipping the RO cartridges. If a buyer wants the RO unit I will only charge for additional shipping as I believe it is jot working.

The Aqua-Pure AP5527 New Water Filter is a high-quality 2-stage reverse osmosis filter designed for commercial and household use. With a filter life of 6 months, this filter cartridge is made of durable plastic and is compatible with 3M Aqua-Pure RO5000 and RO5500 water filter systems. It has a capacity of 1 liter and can remove chemicals from your water, making it ideal for ensuring clean and safe drinking water in your home. The filter operates at a flow rate range of 0.5 - 1.0, and is suitable for use with Aqua-Pure brand water filters.