' Union Adapter, Basic Material Plastic, Body Material Acetal Copolymer, Connection Type Tube, Tube Size 1/4 In., Max. Pressure 150 psi, Color Gray, Standards NSF-61 For Drinking Water, NSF-51 For Food And FDA For Food And Beverage, Temp. Range -14 Degrees to 167 Degrees F for Air and 33 Degrees to 140 Degrees F for Water