Malida Tube Connect Quick Fitting 1/4" PT to 1/4" OD for RO System Water Filter Pack of 5 1/4 Inch Female Thread NPT to 1/4 Inch OD Tube Straight Connect Applications: Apply to Reverse Osmosis Water System and Housing In Line Filters ETC Package Quantity:5 pack Uses 1/4 Inch Supply Tube Fits all water filter systems