Connects APEC Reverse Osmosis System model RO-Hi and compatible RO systems with 3/8" OUTPUT to refrigerator ice makers for ultrapure water superior to fridge filters Enjoy clear, sparkling & delicious ice cubes and ro water at your fridge dispenser Includes 20' of 1/4 in tubing 1 quick-connect T fitting & 1 quick-connect shut-off ball valve Works with most reverse osmosis and water filter systems with 3/8 inch upgraded output John guest (JG) fittings & tubing for quick & easy installation by hand with no tools needed