Victor 250-80-540 Oxygen Regulator Rebuild/Repair Parts Kit w/ Diaphragm Go to amazon.com Related posts Top 10 oxygen regulator parts for 2019 FeatureDiaphragm (6)Nozzle Gasket (8)Seat Assembly (9)Friction Washer (12)Clear 2" Gauge Lens (1/4 Turn) (2 ea)