... brass ring. 3. 1.5",2",2.5",3",4" avaiable. 1. american type pin plug coupling.2. ... we can offer storz , john morris , french, GOST, spanish types . american type, nakajima type , machino type. zhongdao type ... fast delivery time and good service.7. size:1"-5"8. produce mothod: dia casting , casting ... brass.10. work pressure: 1-1.6MPa. american type pin plug coupling