We are Northwest Chimney Sweep a dedicated NACS sweep, who ordered easily via the website, the delivery was within 2 days.
Compared this brick to the Nestor Martin original, the new one is different as it does not have the cut outs for the 2 lugs. Fitting was more difficult because of this, it was obvious that the brick is a cut out from a larger piece of fire brick to the size but care not taken to incorporate the lug cut outs to make it easier to fit.
MANAGEMENT RESPONSE: Thank you for your review. Nestor Martin was taken over a few years ago and the bricks were changed to the current format by the new owners. Hope this helps.