The Bare Bones is an economical reverse osmosis unit that is compact in size for situations that require less space and the benefit of being portable. The Bare Bones is available with a TFC or Hi-S membrane. The TFC unit will remove an average 94-98% of tap water contaminants and the Hi-S will remove 97-99.5%. The Bare Bones also includes an inline pre-filter, a ¾ inch garden hose adapter and 6 feet of yellow, blue and orange tubing.