Due Late April 2024 - see these alternatives that may be suitable.

Replaces many air button brands & styles. Available in White, Grey, or Chrome. Gold no longer available. Suits 35-40mm hole. Your hole may need to be drilled out using a stepped hole saw. Button Top is 46mm Outside diameter. Stem is 35mm.

This is an affordable, replacement air button. Comes with water drainage holes to ensure button doesn't become waterlogged. 

Edgetec Enforcer Air Button also replaces Edgetec Reactiv Air Buttons.

Available in Gray, White, or Chrome-plated.