Lynn Manufacturing Insulating Fire Brick, Heat Insulation Block, Low Thermal Conductivity, 2.5" x 4.5" x 9", Pack of 2, 3000F-Rated, for Kilns, Forges, Furnaces, Soldering, 3130Q

I received these bricks with a strong warning label attached: CAUSES CANCER WHEN INHALING DUST! Nowhere on the order site was there any mention of carcinogenic effects caused by handling these bricks!! I immediately threw them away. I have cancer and I don't need additional exposure to carcinogens!! BEWARE WHEN ORDERING PRODUCTS ON AMAZON!!!

Ordered one, had to return it as arrived useless. Ordered another one arrived in similar condotions, had to return that one as well.

I was expecting much better quality for the price. The product arrived in perfect condition. I bought 2 bricks 2600F. Both of them seem of different quality (although they were both market "26"). In one of the bricks, one of the corners pulverized. They are going back. I would not recommend this product.

Holds enough heat for a nice bright yellow on 1095, W2, and some rebar in my little baby home made no weld forge heated by a propane torch.Bottom is the hard fire bricks, sides and top, and the "doors" are this type. Cut some slots into a scrap piece to hold knives upright - that's what's in the middle.

Mostly intact with a few busted corners and lots of dust in the bubble wrap. After reading the cancer warning sign about the dust it made me a little worried about getting it all cleaned up safely.Be aware that these bricks are very soft. They are going to crumble and the corners after almost certainly going to break in shipping. While mine were very well wrapped they still lost a few corners. Just accept that before you buy them.

Used this as the floor and door of my mini foundry. Works extremely well. Very easy to cut with a wood hand saw. Follow precautions.. wear a mask.

After all the reviews complaining about the bricks arriving broken or chipped, I didn’t expect much. My package of four 2300° bricks arrived beautifully packaged and in perfect condition. I’m using them along with nycad wire to make hangers for pottery test tiles.

These fire bricks are great for insulating my forge. They do a great job insulating and dispersing heat. The only problem is that they were packaged so poorly, without any protective cushioning, that there were chunks broken off the corners when I opened it up. I can’t even blame the delivery driver, because these bricks are very delicate and the fact they survived at all was kind of amazing considering how they were packed. Be advised that you may need to order 1 or 2 extra so you are not short due to damage done in transport.