Main Valve Spring (5/Pack) D51B-BD51B-CD51B-EG101B-BG101B-CD61BD61EG111EG11ED61B Gas AssemblyD61E Gas AssemblyG11E Gas Assembly Description Main Valve Spring (5/Pack)Compatibility D51B-BD51B-CD51B-EG101B-BG101B-CD61BD61EG111EG11EDiagrams D61B Gas AssemblyD61E Gas AssemblyG11E Gas Assembly