"well, I think I can safely say that this does exactly what is asked of it. It slips on the end like its made to fit, grips round the shaft as the nut gets closer and seals so no leakage occurs. It is more reliable than the post. boom."
"Exactly what you expect. good fitting. Never had any issues with them not being round etc... Way more sensible option rather than buying new fittings when this allows you to re-use existing compresion fittings..."
"I replaced my bathroom tap a few weeks ago. The new tap hoses were a little too short so I had to extend from the isolator valves using a few inches of extra copper pipe. These olives made a nice water-tight job. Still no leaks, fingers crossed. Nice and cheap; can't really see why you'd need to pay more. But then, I'm no expert."