JiuWu RO Feed Water Adapter 1/2" to 1/4" Ball Valve Faucet Tap Feed Reverse Osmosis Light Weight,Easy Install and unload Applications: Apply to Reverse Osmosis Water System and Housing In Line Filters ETC Tee union:1/2" Thread male x 1/2" thread female x 1/4" thread female.stainless steel Ball valve:1/4" Thread male x 1/4 tube quick connect.copper material 100% New,Never Used