[Alex Gardiner]

My apologies Ben and thank you for clarifying the question 

The new brush is based on the medium mixed so the outer bristles are medium stiffness rather than stiff.

[robert mitchell]

Alex , have you started work on an extreme sill brush yet?

[ben M]

My apologies Ben and thank you for clarifying the question 

The new brush is based on the medium mixed so the outer bristles are medium stiffness rather than stiff.

thanks Alex