Insulating Fire Brick, 2300F Rated, 4-Pack, 9" x 4.5" x 2.5", 3123R

I am a goldsmith and use these for firing metal clay and soldering. They work great

Grateful product that I used to insulate the clean out door on the chimney for my woodstove. Easy to cut to size.

Have a very old kiln and the cover was broken. The firebricks replaced the broken firebricks and the lid works perfectly.

Based on several recommendations, I used several of these to make my first forge. They work great, but boy, are they fragile! Especially when a little uneven tension is applied! VERY easy to crack/split.

The brick arrived on time and in great condition. Just what I need to soldering.

Great bricks for the price!

Packaged with each brick in a separate cardboard enclosure and delivered in two days by UPS, no bricks were broken. Since it was raining UPS even brought the two heavy boxes around to the back door porch to keep them dry. Bricks are perfect for a lost wax burn out oven I'm building.

Wrong size, useless to me

Using this for my jewelry soldering. Works very well.

Got what I paid for. I am honestly surprised it survived shipping. When you go to remove it from packaging, there are several layers of cardboard around it which seems pretty decent at protecting the bricks. They are pretty delicate so I'm impressed they survived. If the bricks don't perform as expected in the forge I will update this review.