Parker Hannifin LIQUIfit Polymer Body Union Connector Fitting, 5/16" Push-to-Connect Tube x 3/8" Push-to-Connect Tube Stainless steel grab ring EPDM d-seal Meets requirements of FDA, NSF 51 and NSF 61 D-seal provides a positive seal on the O.D. Of the tube, in both static and Dynamic positions High chemical resistance