Note: The color of the item may vary slightly due to photography and your own computer Standard fitting for water filter systems using 6mm water filter tubing Description: Item:1/4" Equal Y Quick Connect Fitting. Material: POM(Polyoxymethylene) Medium Temperature: 5~50 Centigrate Applications: Apply to Reverse Osmosis Water System and Housing In Line Filters ETC. Tube Dia:1/4" OD Tube x 1/4" OD Tube Check Valve with seal Size:40x29mm/1.57"x1.14"(LxW)