Some friends who live out in the country miles from anywhere have a kitchen mixer tap that's faulty.
Last time I was there I took the tap apart to find the bit that needs replacing and the attached photo shows what it's like. I put it back in the tap so they can still use until my next visit.
formatting link
I took the photo to the plumbers merchant who said I needed to take the head of the tap in as the splines are all different on these things.
So, any suggestions as to how I can get an accurate impression of the splines without my friend having to post me the head of his tap?
Best I can come up with so far is for him to do it with Blue Tack