Desert Water Conditioning Reverse Osmosis filter change tool kit. Includes all the tools needed to service your reverse osmosis system Includes Pentek(R) filter canister wrench, TDS meter, pressure gauge, service tubing and fitting assortment. Includes the new service manual "How to Service Your Reverse Osmosis System" by Dionicio Porras. Filter pack available separately for your specific ro system. Service your reverse osmosis like a pro!