1"-20 Threads to 13/16 ID hose 1393K for new style 1402 1405 1376 welch pump
Port B: 1"-20 thread which can fit welch pump models 1402, 1405, and 1376. Port A: 13/16" ID hose adapter, quick connect to any vacuum system by hose. This inlet/exhaust connector for use with pump models 1402, 1405, and 1376.