bleed screw size?

[mynydd]

Can anyone advise on how to know what size bleed screw I need for my bike? (Scott sub sport 2019) and where to get one from.
I just ordered what I thought was the right size, its arrived and its too big.
many thanks

 

[Ming the Merciless]

You need to know the make and model of calliper then check the manual

 

[mynydd]

thanks, its the one on the lever. I’m unsure what type, there is nothing written on it.