This System Comes with the following. 1st stage Sediment Water Filter 5 micron 2.75" x9.75". 2nd stage Carbon Block Filter 5 micron 2.75" x 9.75". 3rd stage GAC Filter 2.75 x 9.75. 4th Stage Reverse Osmosis DI membrane.5th stage DI Deionization 2 x 10. 7th Stage Di Deionization 2 x 10. Comes with color coded tubing for easy installation and use. 1st housing is clear to see when to change filters. Check valve on the product water tubing. We have years of experience crafting our solutions for specific water sources in California. Our whole house water systems is designed to give you the best water quality from every faucet in your home. Setting ourselves apart from the competition, we use a three stage water system to clean, soften, and purify your water. A whole house filter, softener, and a reverse osmosis system. 18354 3/4 SOLEDAD CANYON ROAD. The item "Premier 7 Stage RO/DI Aquarium Reef Reverse Osmosis Deionizing RO Filter System" is in sale since Friday, June 15, 2012. This item is in the category "Pet Supplies\Fish & Aquariums\Reverse Osmosis & Deionization". The seller is "dhillonnoni" and is located in North Hollywood, California. This item can be shipped worldwide.