1st stage: 5 Micron Spun Fiber Pre-filter 2nd stage: Granular Activated Carbon filter 3rd stage: 1 Micron Spun Fiber Pre-filter 4th stage: RO Membrane( 1812-50GPD) 5th stage: Post Activated Carbon filter Check Valve Flow Restrictor Storage Tank (3.2 G) Booster Pump Accessories Kit (Faucet, Wrench, Water adapter & Ball valve) Dimensions: 43 x 22 x 51 cm Weight: 15 Kgs