Parker Hannifin A6WY4-MG TrueSeal Acetal"Y" Union Fitting with EPDM Seal, 3/8" Push-to-Connect Tube x 1/4" Push-to-Connect Tube, Gray Gripping teeth available in stainless steel or with and Engineered thermoplastic bite edge Engineered O-Ring increases seal compression on tube FDA Compliant. Maximum Working Pressure (psi):300. Maximum Working Pressure (bar) :20 All fittings are nsf-51 listed Push button release