The ProOne® G2.0 series filter is the only gravity filter that bears the distinguished NSF/ANSI-42 component certification. Outstanding performance in the reduction of over 200+ contaminants including heavy metals, fluoride, pesticides, herbicides, chlorine, chloramines, bacteria, pharmaceuticals and more! Ideal for use with most natural potable water sources. Available in 4 sizes to fit most other gravity filtration systems. Advanced features of the ProOne® G2.0 series filter includes: -“All-in-one” filter technology. NO add-on filter required for fluoride reduction -Silver infused outer ceramic shell, helps prevent the growth of bacteria, proprietary carbon based granular media inside the core -No priming required -Cleanable, reusable, can be stored in a cool dry place when not in use -Does not need to be kept saturated when not in use -Available in 4 sizes, 4”, 5”, 7” and 9” tall by 2.75” diameter -Improved flow rates ???? Tested by a certified independent lab to NSF/ANSI Standards 42, 53, P231, P401 and P473. Please visit our lab reports for complete details.