The Standard Metal Head Kit for 1/2" Taps includes all necessary cartridges.
The Inventive Creations Standard Metal Head Kit for 1/2" Taps (REV1) is an authentic, new product from Inventive Creations, backed by the manufacturer's warranty.
3/4" Tap conversion kit available:
https://gksplumbingsupplies.co.uk › products › tap-head-conversion-kit-1-2-to-3-4-conv