Standard features on RO Unit: NSF CONNECT FITTINGS 1st Stage: NSF 5 Micron Sediment 2nd Stage: NSF 5 Micron Coconut Shell Carbon 3rd Stage: NSF 5 Micron Coconut Shell Carbon 4th Stage:NSF Membrane 50 GPD TFC 5th Stage: NSF 10" GAC coconut shell Inline NSF Tank 3.2 Gallon Draw Down NSF Faucet: Long Reach, Lead Free