The GoSun Stove evacuated tube is made of tough borosilicate glass — the same as Pyrex, but it can break in extreme cases. All of our larger stoves are backed with a one-Year Limited Tube Warranty on the evacuated tube. In short, if you break it, we've got you covered.
This warranty however is not extended to the GoSun Go, in which case a replacement can be purchased from GoSun at a reasonable price by contacting us at firstname.lastname@example.org.
Read the full policy here: https://www.gosunstove.com/pages/gosuns-one-year-no-questions-asked-warranty