Item Burner: Coupling Type: Flexible For Use With: Beckett AF/AFG/NX/AFII Series Burners Used With Oil Fired Heating Equipment such as, 4NU97, 4NU98, 3AAC2, 6E772, 6E773, 6E774, 6E775, 6E776, 6E777, 6E778, 6E779, 6MH08, 6MH09, 6MH11, 6MH13, 6MH14, Check Equipment Manufacturers Specifications For Correct Application Special Information: Motor Shaft to Pump