Today I noticed a crack on one of my firebricks. Are these manufacturer specific or can I just cut a regular one from the store to size? It's a 2019 Osburn 1600 insert. I figured I'd see what you guys thought before calling the dealer or SBI for a new one. It's the bottom, front left. Unsure how long it's been there, I don't think it's having any adverse effects it's just eventually going to fall out and I want a replacement handy.
![[Hearth.com] Replacement Firebricks [Hearth.com] Replacement Firebricks](https://www.hearth.com/talk/data/attachments/322/322089-2ba1c858b3cbe9c21454cbdae3e7f5b8.jpg?hash=Q7PdjWh-Fn)
![[Hearth.com] Replacement Firebricks [Hearth.com] Replacement Firebricks](https://www.hearth.com/talk/data/attachments/322/322089-2ba1c858b3cbe9c21454cbdae3e7f5b8.jpg?hash=Q7PdjWh-Fn)