After years of use the heat gaskets on your Primo grill will wear down, this is normal. Not replacing them can result in a loss of temperature, longer cook times and an inconsistent temperature of heat. These replacement gaskets will fit your Primo Oval JR or Primo Large Round Kamado grill. Simply follow the included instructions and within 5 minutes you're back to having a brand new Primo grill. Product is made in the United States and includes enough material to replace base, dome and dome neck of your Primo Grill.