- 302 stainless steel spring and EPDM O-ring - Excellent chemical resistance - 1/4" port for pressure gauge pipe plug included - 1/2" Inlet and pipe connections - 60 PSI The black letter A on the adjusting cap indicates it is 60 PSI, per TeeJet manufacturing information ProductSiteLaunchDate : 2018-10-02T17:27:15.322Z Size : 1 Count (Pack of 1) SpecificationMet : asme Style : Threaded SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable UnitCount : 1 UnspscCode : 40141600 ValveType : safety valve