Victor SR250D SR250C Oxygen Regulator Rebuild/Repair Parts Kit w/ Diaphragm Go to amazon.com Related posts The 10 best torch kit repair for 2022 FeatureDiaphragm Assembly (6)Nylon Gasket (8)Seat Assembly (9)Friction Ring (12) DescriptionWarning: These parts must be installed by a qualified technician. If these parts are installed incorrectly, serious injury or death may occur.