This mixer diaphragm button insert is a replacement part commonly used in IMPCO-style propane mixers and regulators, including models in the 782–785 series. It fits inside the diaphragm housing and interacts with the valve seat to regulate fuel flow during vapor withdrawal operations.✔️ Gas-Resistant Composite Construction✔️ Precision-Molded Interface for Tight FitThis mixer diaphragm button insert is a replacement part commonly used in IMPCO-style propane mixers and regulators, including models in the 782–785 series. It fits inside the diaphragm housing and interacts with the valve seat to regulate fuel flow during vapor withdrawal operations.✔️ Gas-Resistant Composite Construction✔️ Precision-Molded Interface for Tight Fit✔️ Compatible with vapor regulators for LP or propane systems✔️ Ideal for restoring pressure regulation function in aging mixers✔️ Designed for use with IMPCO/BEAM regulator bodies✔️ May also fit other similar aftermarket assembliesNote: Please confirm your regulator/mixer model before purchase. No identifying brand marks present, but part aligns with OEM specs for diaphragm valves in common vapor fuel systems.✔️ Compatible with vapor regulators for LP or propane systems✔️ Ideal for restoring pressure regulation function in aging mixers✔️ Designed for use with IMPCO/BEAM regulator bodies✔️ May also fit other similar aftermarket assembliesNote: Please confirm your regulator/mixer model before purchase. No identifying brand marks present, but part aligns with OEM specs for diaphragm valves in common vapor fuel systems.