"Filter cartridges" are small, cylinder-shaped objects that contain a material which helps to clean and purify things like air, water, or other substances by removing impurities or unwanted particles. Full definition
There are many options for commercial grade water filter cartridges for ice makers. (chefstoys.com)
So we can avoid plastic water filter cartridges from now on. (myplasticfreelife.com)
The hot tub also includes a chemical floater, a twin pack of filter cartridges, an inflatable cover, and a DVD with setup and maintenance instructions. (geekwrapped.com)