Review on 🔥 Lynn Manufacturing Fire Heat Insulation Brick - Soldering Torch Welding Insulating Block, Low Thermal Conductivity - Ideal for Kilns, Forges, Furnaces, Soldering - 2.5"x4.5"x9", Single Pack, 2300F-Rated, 3123P by Kelly Caballes

I bought a pair of these bricks as I only needed two. Both bricks appear to be of poor quality, having broken corners and chips. I have purchased other brands of refractory bricks in the past and they have been in very good condition. Not worth going back as I can still use these poor quality stones for what I intended. I would definitely not recommend this stone to anyone. They arrived well packaged so I don't think they were damaged in transit. Most likely, the person who wrapped them ignored the poor quality product they wrapped.