Port A: 13/16" ID hose adapter, quick connect to any vacuum system by hose
Port B: 1"-20 thread which can fit welch pump models 1402, 1405, and 1376
ISO-KF type inlet/exhaust connector for use with pump models 1402, 1405, and 1376
Made of Stainless steel
FKM O-ring good for high temperature and chemical environment