Sarah, Caustic’s remarks on the halfords brush – these are flow through poles and brushes, the water just runs up the centre of the pole (not in a tube like wfp poles) then it flows through a hole in the middle of the brush. DO NOT USE THESE AS WFP BRUSHES AS YOU ARE ASKING FOR TROUBLE.Caustic, I really hope you do not use this brush for doing peoples windows, you will give wfp’s a really bad name.