Part Number: 1520-01-249-0060 (Support tube, orfice)Part Number: 1620-01-249-0050 (Support tube, orfice)Part Number: 1620-01-249-0060 (Support tube, orfice)Part Number: 68A452613 (Support tube, orfice)Part Number: 68A452613-2001 (Support tube, orfice)Part Number: 68A452623 (Support tube, orfice)