Shieldmaster 6" (150mm) 1000mm Length Twin Wall Insulated Flue Pipe Inc Locki...

Good for the cost. I've seen better quality, slightly thicker walled pipe but at double the price. This is more than adequate for most purposes. All the parts fit well. Very pleased.

Arrived with a minor ding, but then almost impossible to fit nicely to other sheildmaster fittings. Didn't help that inner sleeve was egg shaped but even with it gently reshaped it would not go together well. I'm a pretty reasonable engineer and after a couple of hours got it gas tight, but surely it should just slot in and not need hours of fettling? Can only assume their system is a bit crap.

Can't recommend