Authorised Tezla seller

LPG or Natural Gas Jet Nozzle Injector M6x0.75 Thread Orifices From 0.24 to 2.0

You select your orifice size and add to basket

Look up your gas appliance manual and in the technical data table it will state what nozzle sizes you gas appliance requires

Specification
M6 x 0.75 Thread
7mm Head (Check if your existing nozzles fit a 7mm spanner or sockthead)
9mm in Height

Always get a Professional Gas Installer to do your gas installation