ATWFS RO Water Filtration System Kit for Icemaker Refrigerator and Water Filters Includes 20ft of 1/4" standard food-grade tubing,1 Tee fitting and 1 shut-off ball valve. Connects RO systems to refrigerator ice makers. Fit for most reverse osmosis and water filter systems. Easy installation by hand with no tools needed. Enjoy ice cubes and RO water at your fridge dispenser.